forked from OSchip/llvm-project
880 lines
37 KiB
LLVM
880 lines
37 KiB
LLVM
; RUN: opt < %s -sroa -S | FileCheck %s
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; RUN: opt < %s -sroa -force-ssa-updater -S | FileCheck %s
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
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declare void @llvm.lifetime.start(i64, i8* nocapture)
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declare void @llvm.lifetime.end(i64, i8* nocapture)
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define i32 @test0() {
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; CHECK: @test0
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; CHECK-NOT: alloca
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; CHECK: ret i32
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entry:
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%a1 = alloca i32
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%a2 = alloca float
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%a1.i8 = bitcast i32* %a1 to i8*
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call void @llvm.lifetime.start(i64 4, i8* %a1.i8)
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store i32 0, i32* %a1
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%v1 = load i32* %a1
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call void @llvm.lifetime.end(i64 4, i8* %a1.i8)
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%a2.i8 = bitcast float* %a2 to i8*
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call void @llvm.lifetime.start(i64 4, i8* %a2.i8)
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store float 0.0, float* %a2
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%v2 = load float * %a2
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%v2.int = bitcast float %v2 to i32
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%sum1 = add i32 %v1, %v2.int
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call void @llvm.lifetime.end(i64 4, i8* %a2.i8)
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ret i32 %sum1
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}
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define i32 @test1() {
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; CHECK: @test1
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; CHECK-NOT: alloca
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; CHECK: ret i32 0
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entry:
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%X = alloca { i32, float }
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%Y = getelementptr { i32, float }* %X, i64 0, i32 0
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store i32 0, i32* %Y
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%Z = load i32* %Y
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ret i32 %Z
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}
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define i64 @test2(i64 %X) {
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; CHECK: @test2
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; CHECK-NOT: alloca
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; CHECK: ret i64 %X
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entry:
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%A = alloca [8 x i8]
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%B = bitcast [8 x i8]* %A to i64*
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store i64 %X, i64* %B
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br label %L2
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L2:
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%Z = load i64* %B
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ret i64 %Z
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}
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define void @test3(i8* %dst, i8* %src) {
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; CHECK: @test3
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entry:
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%a = alloca [300 x i8]
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; CHECK-NOT: alloca
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; CHECK: %[[test3_a1:.*]] = alloca [42 x i8]
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; CHECK-NEXT: %[[test3_a2:.*]] = alloca [99 x i8]
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; CHECK-NEXT: %[[test3_a3:.*]] = alloca [16 x i8]
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; CHECK-NEXT: %[[test3_a4:.*]] = alloca [42 x i8]
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; CHECK-NEXT: %[[test3_a5:.*]] = alloca [7 x i8]
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; CHECK-NEXT: %[[test3_a6:.*]] = alloca [7 x i8]
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; CHECK-NEXT: %[[test3_a7:.*]] = alloca [85 x i8]
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%b = getelementptr [300 x i8]* %a, i64 0, i64 0
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %b, i8* %src, i32 300, i32 1, i1 false)
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a1]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %src, i32 42
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 42
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; CHECK-NEXT: %[[test3_r1:.*]] = load i8* %[[gep]]
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 43
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [99 x i8]* %[[test3_a2]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 99
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 142
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 16
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 158
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a4]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 42
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 200
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 207
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; CHECK-NEXT: %[[test3_r2:.*]] = load i8* %[[gep]]
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 208
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 215
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [85 x i8]* %[[test3_a7]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 85
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; Clobber a single element of the array, this should be promotable.
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%c = getelementptr [300 x i8]* %a, i64 0, i64 42
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store i8 0, i8* %c
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; Make a sequence of overlapping stores to the array. These overlap both in
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; forward strides and in shrinking accesses.
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%overlap.1.i8 = getelementptr [300 x i8]* %a, i64 0, i64 142
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%overlap.2.i8 = getelementptr [300 x i8]* %a, i64 0, i64 143
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%overlap.3.i8 = getelementptr [300 x i8]* %a, i64 0, i64 144
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%overlap.4.i8 = getelementptr [300 x i8]* %a, i64 0, i64 145
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%overlap.5.i8 = getelementptr [300 x i8]* %a, i64 0, i64 146
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%overlap.6.i8 = getelementptr [300 x i8]* %a, i64 0, i64 147
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%overlap.7.i8 = getelementptr [300 x i8]* %a, i64 0, i64 148
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%overlap.8.i8 = getelementptr [300 x i8]* %a, i64 0, i64 149
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%overlap.9.i8 = getelementptr [300 x i8]* %a, i64 0, i64 150
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%overlap.1.i16 = bitcast i8* %overlap.1.i8 to i16*
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%overlap.1.i32 = bitcast i8* %overlap.1.i8 to i32*
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%overlap.1.i64 = bitcast i8* %overlap.1.i8 to i64*
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%overlap.2.i64 = bitcast i8* %overlap.2.i8 to i64*
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%overlap.3.i64 = bitcast i8* %overlap.3.i8 to i64*
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%overlap.4.i64 = bitcast i8* %overlap.4.i8 to i64*
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%overlap.5.i64 = bitcast i8* %overlap.5.i8 to i64*
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%overlap.6.i64 = bitcast i8* %overlap.6.i8 to i64*
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%overlap.7.i64 = bitcast i8* %overlap.7.i8 to i64*
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%overlap.8.i64 = bitcast i8* %overlap.8.i8 to i64*
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%overlap.9.i64 = bitcast i8* %overlap.9.i8 to i64*
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store i8 1, i8* %overlap.1.i8
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 0
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; CHECK-NEXT: store i8 1, i8* %[[gep]]
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store i16 1, i16* %overlap.1.i16
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast [16 x i8]* %[[test3_a3]] to i16*
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; CHECK-NEXT: store i16 1, i16* %[[bitcast]]
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store i32 1, i32* %overlap.1.i32
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast [16 x i8]* %[[test3_a3]] to i32*
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; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
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store i64 1, i64* %overlap.1.i64
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast [16 x i8]* %[[test3_a3]] to i64*
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; CHECK-NEXT: store i64 1, i64* %[[bitcast]]
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store i64 2, i64* %overlap.2.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 1
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 2, i64* %[[bitcast]]
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store i64 3, i64* %overlap.3.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 2
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 3, i64* %[[bitcast]]
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store i64 4, i64* %overlap.4.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 3
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 4, i64* %[[bitcast]]
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store i64 5, i64* %overlap.5.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 4
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 5, i64* %[[bitcast]]
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store i64 6, i64* %overlap.6.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 5
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 6, i64* %[[bitcast]]
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store i64 7, i64* %overlap.7.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 6
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 7, i64* %[[bitcast]]
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store i64 8, i64* %overlap.8.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 7
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 8, i64* %[[bitcast]]
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store i64 9, i64* %overlap.9.i64
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 8
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
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; CHECK-NEXT: store i64 9, i64* %[[bitcast]]
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; Make two sequences of overlapping stores with more gaps and irregularities.
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%overlap2.1.0.i8 = getelementptr [300 x i8]* %a, i64 0, i64 200
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%overlap2.1.1.i8 = getelementptr [300 x i8]* %a, i64 0, i64 201
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%overlap2.1.2.i8 = getelementptr [300 x i8]* %a, i64 0, i64 202
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%overlap2.1.3.i8 = getelementptr [300 x i8]* %a, i64 0, i64 203
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%overlap2.2.0.i8 = getelementptr [300 x i8]* %a, i64 0, i64 208
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%overlap2.2.1.i8 = getelementptr [300 x i8]* %a, i64 0, i64 209
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%overlap2.2.2.i8 = getelementptr [300 x i8]* %a, i64 0, i64 210
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%overlap2.2.3.i8 = getelementptr [300 x i8]* %a, i64 0, i64 211
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%overlap2.1.0.i16 = bitcast i8* %overlap2.1.0.i8 to i16*
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%overlap2.1.0.i32 = bitcast i8* %overlap2.1.0.i8 to i32*
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%overlap2.1.1.i32 = bitcast i8* %overlap2.1.1.i8 to i32*
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%overlap2.1.2.i32 = bitcast i8* %overlap2.1.2.i8 to i32*
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%overlap2.1.3.i32 = bitcast i8* %overlap2.1.3.i8 to i32*
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store i8 1, i8* %overlap2.1.0.i8
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
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; CHECK-NEXT: store i8 1, i8* %[[gep]]
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store i16 1, i16* %overlap2.1.0.i16
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast [7 x i8]* %[[test3_a5]] to i16*
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; CHECK-NEXT: store i16 1, i16* %[[bitcast]]
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store i32 1, i32* %overlap2.1.0.i32
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast [7 x i8]* %[[test3_a5]] to i32*
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; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
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store i32 2, i32* %overlap2.1.1.i32
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 1
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: store i32 2, i32* %[[bitcast]]
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store i32 3, i32* %overlap2.1.2.i32
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 2
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: store i32 3, i32* %[[bitcast]]
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store i32 4, i32* %overlap2.1.3.i32
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 3
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: store i32 4, i32* %[[bitcast]]
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%overlap2.2.0.i32 = bitcast i8* %overlap2.2.0.i8 to i32*
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%overlap2.2.1.i16 = bitcast i8* %overlap2.2.1.i8 to i16*
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%overlap2.2.1.i32 = bitcast i8* %overlap2.2.1.i8 to i32*
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%overlap2.2.2.i32 = bitcast i8* %overlap2.2.2.i8 to i32*
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%overlap2.2.3.i32 = bitcast i8* %overlap2.2.3.i8 to i32*
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store i32 1, i32* %overlap2.2.0.i32
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast [7 x i8]* %[[test3_a6]] to i32*
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; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
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store i8 1, i8* %overlap2.2.1.i8
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
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; CHECK-NEXT: store i8 1, i8* %[[gep]]
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store i16 1, i16* %overlap2.2.1.i16
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
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; CHECK-NEXT: store i16 1, i16* %[[bitcast]]
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store i32 1, i32* %overlap2.2.1.i32
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
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store i32 3, i32* %overlap2.2.2.i32
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 2
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: store i32 3, i32* %[[bitcast]]
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store i32 4, i32* %overlap2.2.3.i32
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 3
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; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: store i32 4, i32* %[[bitcast]]
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%overlap2.prefix = getelementptr i8* %overlap2.1.1.i8, i64 -4
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %overlap2.prefix, i8* %src, i32 8, i32 1, i1 false)
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a4]], i64 0, i64 39
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %src, i32 3
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 3
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 5
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; Bridge between the overlapping areas
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call void @llvm.memset.p0i8.i32(i8* %overlap2.1.2.i8, i8 42, i32 8, i32 1, i1 false)
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 2
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; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* %[[gep]], i8 42, i32 5
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; ...promoted i8 store...
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* %[[gep]], i8 42, i32 2
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; Entirely within the second overlap.
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %overlap2.2.1.i8, i8* %src, i32 5, i32 1, i1 false)
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep]], i8* %src, i32 5
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; Trailing past the second overlap.
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %overlap2.2.2.i8, i8* %src, i32 8, i32 1, i1 false)
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; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 2
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep]], i8* %src, i32 5
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; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 5
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; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [85 x i8]* %[[test3_a7]], i64 0, i64 0
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 3
|
|
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %b, i32 300, i32 1, i1 false)
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a1]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[gep]], i32 42
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 42
|
|
; CHECK-NEXT: store i8 0, i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 43
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [99 x i8]* %[[test3_a2]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 99
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 142
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 16
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 158
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a4]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 42
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 200
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 207
|
|
; CHECK-NEXT: store i8 42, i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 208
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 215
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [85 x i8]* %[[test3_a7]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 85
|
|
|
|
ret void
|
|
}
|
|
|
|
define void @test4(i8* %dst, i8* %src) {
|
|
; CHECK: @test4
|
|
|
|
entry:
|
|
%a = alloca [100 x i8]
|
|
; CHECK-NOT: alloca
|
|
; CHECK: %[[test4_a1:.*]] = alloca [20 x i8]
|
|
; CHECK-NEXT: %[[test4_a2:.*]] = alloca [7 x i8]
|
|
; CHECK-NEXT: %[[test4_a3:.*]] = alloca [10 x i8]
|
|
; CHECK-NEXT: %[[test4_a4:.*]] = alloca [7 x i8]
|
|
; CHECK-NEXT: %[[test4_a5:.*]] = alloca [7 x i8]
|
|
; CHECK-NEXT: %[[test4_a6:.*]] = alloca [40 x i8]
|
|
|
|
%b = getelementptr [100 x i8]* %a, i64 0, i64 0
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %b, i8* %src, i32 100, i32 1, i1 false)
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [20 x i8]* %[[test4_a1]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep]], i8* %src, i32 20
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 20
|
|
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
|
|
; CHECK-NEXT: %[[test4_r1:.*]] = load i16* %[[bitcast]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 22
|
|
; CHECK-NEXT: %[[test4_r2:.*]] = load i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 23
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a2]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 30
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [10 x i8]* %[[test4_a3]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 10
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 40
|
|
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
|
|
; CHECK-NEXT: %[[test4_r3:.*]] = load i16* %[[bitcast]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 42
|
|
; CHECK-NEXT: %[[test4_r4:.*]] = load i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 43
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 50
|
|
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
|
|
; CHECK-NEXT: %[[test4_r5:.*]] = load i16* %[[bitcast]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 52
|
|
; CHECK-NEXT: %[[test4_r6:.*]] = load i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 53
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a5]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 60
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [40 x i8]* %[[test4_a6]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 40
|
|
|
|
%a.src.1 = getelementptr [100 x i8]* %a, i64 0, i64 20
|
|
%a.dst.1 = getelementptr [100 x i8]* %a, i64 0, i64 40
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a.dst.1, i8* %a.src.1, i32 10, i32 1, i1 false)
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a2]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
|
|
; Clobber a single element of the array, this should be promotable, and be deleted.
|
|
%c = getelementptr [100 x i8]* %a, i64 0, i64 42
|
|
store i8 0, i8* %c
|
|
|
|
%a.src.2 = getelementptr [100 x i8]* %a, i64 0, i64 50
|
|
call void @llvm.memmove.p0i8.p0i8.i32(i8* %a.dst.1, i8* %a.src.2, i32 10, i32 1, i1 false)
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a5]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %b, i32 100, i32 1, i1 false)
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [20 x i8]* %[[test4_a1]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[gep]], i32 20
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 20
|
|
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
|
|
; CHECK-NEXT: store i16 %[[test4_r1]], i16* %[[bitcast]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 22
|
|
; CHECK-NEXT: store i8 %[[test4_r2]], i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 23
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a2]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 30
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [10 x i8]* %[[test4_a3]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 10
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 40
|
|
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
|
|
; CHECK-NEXT: store i16 %[[test4_r5]], i16* %[[bitcast]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 42
|
|
; CHECK-NEXT: store i8 %[[test4_r6]], i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 43
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 50
|
|
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
|
|
; CHECK-NEXT: store i16 %[[test4_r5]], i16* %[[bitcast]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 52
|
|
; CHECK-NEXT: store i8 %[[test4_r6]], i8* %[[gep]]
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 53
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a5]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
|
|
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 60
|
|
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [40 x i8]* %[[test4_a6]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 40
|
|
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
|
|
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
|
|
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
|
|
|
|
define i16 @test5() {
|
|
; CHECK: @test5
|
|
; CHECK: alloca float
|
|
; CHECK: ret i16 %
|
|
|
|
entry:
|
|
%a = alloca [4 x i8]
|
|
%fptr = bitcast [4 x i8]* %a to float*
|
|
store float 0.0, float* %fptr
|
|
%ptr = getelementptr [4 x i8]* %a, i32 0, i32 2
|
|
%iptr = bitcast i8* %ptr to i16*
|
|
%val = load i16* %iptr
|
|
ret i16 %val
|
|
}
|
|
|
|
define i32 @test6() {
|
|
; CHECK: @test6
|
|
; CHECK: alloca i32
|
|
; CHECK-NEXT: store volatile i32
|
|
; CHECK-NEXT: load i32*
|
|
; CHECK-NEXT: ret i32
|
|
|
|
entry:
|
|
%a = alloca [4 x i8]
|
|
%ptr = getelementptr [4 x i8]* %a, i32 0, i32 0
|
|
call void @llvm.memset.p0i8.i32(i8* %ptr, i8 42, i32 4, i32 1, i1 true)
|
|
%iptr = bitcast i8* %ptr to i32*
|
|
%val = load i32* %iptr
|
|
ret i32 %val
|
|
}
|
|
|
|
define void @test7(i8* %src, i8* %dst) {
|
|
; CHECK: @test7
|
|
; CHECK: alloca i32
|
|
; CHECK-NEXT: bitcast i8* %src to i32*
|
|
; CHECK-NEXT: load volatile i32*
|
|
; CHECK-NEXT: store volatile i32
|
|
; CHECK-NEXT: bitcast i8* %dst to i32*
|
|
; CHECK-NEXT: load volatile i32*
|
|
; CHECK-NEXT: store volatile i32
|
|
; CHECK-NEXT: ret
|
|
|
|
entry:
|
|
%a = alloca [4 x i8]
|
|
%ptr = getelementptr [4 x i8]* %a, i32 0, i32 0
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 4, i32 1, i1 true)
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 4, i32 1, i1 true)
|
|
ret void
|
|
}
|
|
|
|
|
|
%S1 = type { i32, i32, [16 x i8] }
|
|
%S2 = type { %S1*, %S2* }
|
|
|
|
define %S2 @test8(%S2* %s2) {
|
|
; CHECK: @test8
|
|
entry:
|
|
%new = alloca %S2
|
|
; CHECK-NOT: alloca
|
|
|
|
%s2.next.ptr = getelementptr %S2* %s2, i64 0, i32 1
|
|
%s2.next = load %S2** %s2.next.ptr
|
|
; CHECK: %[[gep:.*]] = getelementptr %S2* %s2, i64 0, i32 1
|
|
; CHECK-NEXT: %[[next:.*]] = load %S2** %[[gep]]
|
|
|
|
%s2.next.s1.ptr = getelementptr %S2* %s2.next, i64 0, i32 0
|
|
%s2.next.s1 = load %S1** %s2.next.s1.ptr
|
|
%new.s1.ptr = getelementptr %S2* %new, i64 0, i32 0
|
|
store %S1* %s2.next.s1, %S1** %new.s1.ptr
|
|
%s2.next.next.ptr = getelementptr %S2* %s2.next, i64 0, i32 1
|
|
%s2.next.next = load %S2** %s2.next.next.ptr
|
|
%new.next.ptr = getelementptr %S2* %new, i64 0, i32 1
|
|
store %S2* %s2.next.next, %S2** %new.next.ptr
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr %S2* %[[next]], i64 0, i32 0
|
|
; CHECK-NEXT: %[[next_s1:.*]] = load %S1** %[[gep]]
|
|
; CHECK-NEXT: %[[gep:.*]] = getelementptr %S2* %[[next]], i64 0, i32 1
|
|
; CHECK-NEXT: %[[next_next:.*]] = load %S2** %[[gep]]
|
|
|
|
%new.s1 = load %S1** %new.s1.ptr
|
|
%result1 = insertvalue %S2 undef, %S1* %new.s1, 0
|
|
; CHECK-NEXT: %[[result1:.*]] = insertvalue %S2 undef, %S1* %[[next_s1]], 0
|
|
%new.next = load %S2** %new.next.ptr
|
|
%result2 = insertvalue %S2 %result1, %S2* %new.next, 1
|
|
; CHECK-NEXT: %[[result2:.*]] = insertvalue %S2 %[[result1]], %S2* %[[next_next]], 1
|
|
ret %S2 %result2
|
|
; CHECK-NEXT: ret %S2 %[[result2]]
|
|
}
|
|
|
|
define i64 @test9() {
|
|
; Ensure we can handle loads off the end of an alloca even when wrapped in
|
|
; weird bit casts and types. The result is undef, but this shouldn't crash
|
|
; anything.
|
|
; CHECK: @test9
|
|
; CHECK-NOT: alloca
|
|
; CHECK: ret i64 undef
|
|
|
|
entry:
|
|
%a = alloca { [3 x i8] }
|
|
%gep1 = getelementptr inbounds { [3 x i8] }* %a, i32 0, i32 0, i32 0
|
|
store i8 0, i8* %gep1, align 1
|
|
%gep2 = getelementptr inbounds { [3 x i8] }* %a, i32 0, i32 0, i32 1
|
|
store i8 0, i8* %gep2, align 1
|
|
%gep3 = getelementptr inbounds { [3 x i8] }* %a, i32 0, i32 0, i32 2
|
|
store i8 26, i8* %gep3, align 1
|
|
%cast = bitcast { [3 x i8] }* %a to { i64 }*
|
|
%elt = getelementptr inbounds { i64 }* %cast, i32 0, i32 0
|
|
%result = load i64* %elt
|
|
ret i64 %result
|
|
}
|
|
|
|
define %S2* @test10() {
|
|
; CHECK: @test10
|
|
; CHECK-NOT: alloca %S2*
|
|
; CHECK: ret %S2* null
|
|
|
|
entry:
|
|
%a = alloca [8 x i8]
|
|
%ptr = getelementptr [8 x i8]* %a, i32 0, i32 0
|
|
call void @llvm.memset.p0i8.i32(i8* %ptr, i8 0, i32 8, i32 1, i1 false)
|
|
%s2ptrptr = bitcast i8* %ptr to %S2**
|
|
%s2ptr = load %S2** %s2ptrptr
|
|
ret %S2* %s2ptr
|
|
}
|
|
|
|
define i32 @test11() {
|
|
; CHECK: @test11
|
|
; CHECK-NOT: alloca
|
|
; CHECK: ret i32 0
|
|
|
|
entry:
|
|
%X = alloca i32
|
|
br i1 undef, label %good, label %bad
|
|
|
|
good:
|
|
%Y = getelementptr i32* %X, i64 0
|
|
store i32 0, i32* %Y
|
|
%Z = load i32* %Y
|
|
ret i32 %Z
|
|
|
|
bad:
|
|
%Y2 = getelementptr i32* %X, i64 1
|
|
store i32 0, i32* %Y2
|
|
%Z2 = load i32* %Y2
|
|
ret i32 %Z2
|
|
}
|
|
|
|
define i8 @test12() {
|
|
; We fully promote these to the i24 load or store size, resulting in just masks
|
|
; and other operations that instcombine will fold, but no alloca.
|
|
;
|
|
; CHECK: @test12
|
|
|
|
entry:
|
|
%a = alloca [3 x i8]
|
|
%b = alloca [3 x i8]
|
|
; CHECK-NOT: alloca
|
|
|
|
%a0ptr = getelementptr [3 x i8]* %a, i64 0, i32 0
|
|
store i8 0, i8* %a0ptr
|
|
%a1ptr = getelementptr [3 x i8]* %a, i64 0, i32 1
|
|
store i8 0, i8* %a1ptr
|
|
%a2ptr = getelementptr [3 x i8]* %a, i64 0, i32 2
|
|
store i8 0, i8* %a2ptr
|
|
%aiptr = bitcast [3 x i8]* %a to i24*
|
|
%ai = load i24* %aiptr
|
|
; CHCEK-NOT: store
|
|
; CHCEK-NOT: load
|
|
; CHECK: %[[mask0:.*]] = and i24 undef, -256
|
|
; CHECK-NEXT: %[[mask1:.*]] = and i24 %[[mask0]], -65281
|
|
; CHECK-NEXT: %[[mask2:.*]] = and i24 %[[mask1]], 65535
|
|
|
|
%biptr = bitcast [3 x i8]* %b to i24*
|
|
store i24 %ai, i24* %biptr
|
|
%b0ptr = getelementptr [3 x i8]* %b, i64 0, i32 0
|
|
%b0 = load i8* %b0ptr
|
|
%b1ptr = getelementptr [3 x i8]* %b, i64 0, i32 1
|
|
%b1 = load i8* %b1ptr
|
|
%b2ptr = getelementptr [3 x i8]* %b, i64 0, i32 2
|
|
%b2 = load i8* %b2ptr
|
|
; CHCEK-NOT: store
|
|
; CHCEK-NOT: load
|
|
; CHECK: %[[trunc0:.*]] = trunc i24 %[[mask2]] to i8
|
|
; CHECK-NEXT: %[[shift1:.*]] = lshr i24 %[[mask2]], 8
|
|
; CHECK-NEXT: %[[trunc1:.*]] = trunc i24 %[[shift1]] to i8
|
|
; CHECK-NEXT: %[[shift2:.*]] = lshr i24 %[[mask2]], 16
|
|
; CHECK-NEXT: %[[trunc2:.*]] = trunc i24 %[[shift2]] to i8
|
|
|
|
%bsum0 = add i8 %b0, %b1
|
|
%bsum1 = add i8 %bsum0, %b2
|
|
ret i8 %bsum1
|
|
; CHECK: %[[sum0:.*]] = add i8 %[[trunc0]], %[[trunc1]]
|
|
; CHECK-NEXT: %[[sum1:.*]] = add i8 %[[sum0]], %[[trunc2]]
|
|
; CHECK-NEXT: ret i8 %[[sum1]]
|
|
}
|
|
|
|
define i32 @test13() {
|
|
; Ensure we don't crash and handle undefined loads that straddle the end of the
|
|
; allocation.
|
|
; CHECK: @test13
|
|
; CHECK: %[[ret:.*]] = zext i16 undef to i32
|
|
; CHECK: ret i32 %[[ret]]
|
|
|
|
entry:
|
|
%a = alloca [3 x i8]
|
|
%b0ptr = getelementptr [3 x i8]* %a, i64 0, i32 0
|
|
store i8 0, i8* %b0ptr
|
|
%b1ptr = getelementptr [3 x i8]* %a, i64 0, i32 1
|
|
store i8 0, i8* %b1ptr
|
|
%b2ptr = getelementptr [3 x i8]* %a, i64 0, i32 2
|
|
store i8 0, i8* %b2ptr
|
|
%iptrcast = bitcast [3 x i8]* %a to i16*
|
|
%iptrgep = getelementptr i16* %iptrcast, i64 1
|
|
%i = load i16* %iptrgep
|
|
%ret = zext i16 %i to i32
|
|
ret i32 %ret
|
|
}
|
|
|
|
%test14.struct = type { [3 x i32] }
|
|
|
|
define void @test14(...) nounwind uwtable {
|
|
; This is a strange case where we split allocas into promotable partitions, but
|
|
; also gain enough data to prove they must be dead allocas due to GEPs that walk
|
|
; across two adjacent allocas. Test that we don't try to promote or otherwise
|
|
; do bad things to these dead allocas, they should just be removed.
|
|
; CHECK: @test14
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: ret void
|
|
|
|
entry:
|
|
%a = alloca %test14.struct
|
|
%p = alloca %test14.struct*
|
|
%0 = bitcast %test14.struct* %a to i8*
|
|
%1 = getelementptr i8* %0, i64 12
|
|
%2 = bitcast i8* %1 to %test14.struct*
|
|
%3 = getelementptr inbounds %test14.struct* %2, i32 0, i32 0
|
|
%4 = getelementptr inbounds %test14.struct* %a, i32 0, i32 0
|
|
%5 = bitcast [3 x i32]* %3 to i32*
|
|
%6 = bitcast [3 x i32]* %4 to i32*
|
|
%7 = load i32* %6, align 4
|
|
store i32 %7, i32* %5, align 4
|
|
%8 = getelementptr inbounds i32* %5, i32 1
|
|
%9 = getelementptr inbounds i32* %6, i32 1
|
|
%10 = load i32* %9, align 4
|
|
store i32 %10, i32* %8, align 4
|
|
%11 = getelementptr inbounds i32* %5, i32 2
|
|
%12 = getelementptr inbounds i32* %6, i32 2
|
|
%13 = load i32* %12, align 4
|
|
store i32 %13, i32* %11, align 4
|
|
ret void
|
|
}
|
|
|
|
define i32 @test15(i1 %flag) nounwind uwtable {
|
|
; Ensure that when there are dead instructions using an alloca that are not
|
|
; loads or stores we still delete them during partitioning and rewriting.
|
|
; Otherwise we'll go to promote them while thy still have unpromotable uses.
|
|
; CHECK: @test15
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label %loop
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: br label %loop
|
|
|
|
entry:
|
|
%l0 = alloca i64
|
|
%l1 = alloca i64
|
|
%l2 = alloca i64
|
|
%l3 = alloca i64
|
|
br label %loop
|
|
|
|
loop:
|
|
%dead3 = phi i8* [ %gep3, %loop ], [ null, %entry ]
|
|
|
|
store i64 1879048192, i64* %l0, align 8
|
|
%bc0 = bitcast i64* %l0 to i8*
|
|
%gep0 = getelementptr i8* %bc0, i64 3
|
|
%dead0 = bitcast i8* %gep0 to i64*
|
|
|
|
store i64 1879048192, i64* %l1, align 8
|
|
%bc1 = bitcast i64* %l1 to i8*
|
|
%gep1 = getelementptr i8* %bc1, i64 3
|
|
%dead1 = getelementptr i8* %gep1, i64 1
|
|
|
|
store i64 1879048192, i64* %l2, align 8
|
|
%bc2 = bitcast i64* %l2 to i8*
|
|
%gep2.1 = getelementptr i8* %bc2, i64 1
|
|
%gep2.2 = getelementptr i8* %bc2, i64 3
|
|
; Note that this select should get visited multiple times due to using two
|
|
; different GEPs off the same alloca. We should only delete it once.
|
|
%dead2 = select i1 %flag, i8* %gep2.1, i8* %gep2.2
|
|
|
|
store i64 1879048192, i64* %l3, align 8
|
|
%bc3 = bitcast i64* %l3 to i8*
|
|
%gep3 = getelementptr i8* %bc3, i64 3
|
|
|
|
br label %loop
|
|
}
|
|
|
|
define void @test16(i8* %src, i8* %dst) {
|
|
; Ensure that we can promote an alloca of [3 x i8] to an i24 SSA value.
|
|
; CHECK: @test16
|
|
; CHECK-NOT: alloca
|
|
; CHECK: %[[srccast:.*]] = bitcast i8* %src to i24*
|
|
; CHECK-NEXT: load i24* %[[srccast]]
|
|
; CHECK-NEXT: %[[dstcast:.*]] = bitcast i8* %dst to i24*
|
|
; CHECK-NEXT: store i24 0, i24* %[[dstcast]]
|
|
; CHECK-NEXT: ret void
|
|
|
|
entry:
|
|
%a = alloca [3 x i8]
|
|
%ptr = getelementptr [3 x i8]* %a, i32 0, i32 0
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 4, i32 1, i1 false)
|
|
%cast = bitcast i8* %ptr to i24*
|
|
store i24 0, i24* %cast
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 4, i32 1, i1 false)
|
|
ret void
|
|
}
|
|
|
|
define void @test17(i8* %src, i8* %dst) {
|
|
; Ensure that we can rewrite unpromotable memcpys which extend past the end of
|
|
; the alloca.
|
|
; CHECK: @test17
|
|
; CHECK: %[[a:.*]] = alloca [3 x i8]
|
|
; CHECK-NEXT: %[[ptr:.*]] = getelementptr [3 x i8]* %[[a]], i32 0, i32 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[ptr]], i8* %src,
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[ptr]],
|
|
; CHECK-NEXT: ret void
|
|
|
|
entry:
|
|
%a = alloca [3 x i8]
|
|
%ptr = getelementptr [3 x i8]* %a, i32 0, i32 0
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 4, i32 1, i1 true)
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 4, i32 1, i1 true)
|
|
ret void
|
|
}
|
|
|
|
define void @test18(i8* %src, i8* %dst, i32 %size) {
|
|
; Preserve transfer instrinsics with a variable size, even if they overlap with
|
|
; fixed size operations. Further, continue to split and promote allocas preceding
|
|
; the variable sized intrinsic.
|
|
; CHECK: @test18
|
|
; CHECK: %[[a:.*]] = alloca [34 x i8]
|
|
; CHECK: %[[srcgep1:.*]] = getelementptr inbounds i8* %src, i64 4
|
|
; CHECK-NEXT: %[[srccast1:.*]] = bitcast i8* %[[srcgep1]] to i32*
|
|
; CHECK-NEXT: %[[srcload:.*]] = load i32* %[[srccast1]]
|
|
; CHECK-NEXT: %[[agep1:.*]] = getelementptr inbounds [34 x i8]* %[[a]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[agep1]], i8* %src, i32 %size,
|
|
; CHECK-NEXT: %[[agep2:.*]] = getelementptr inbounds [34 x i8]* %[[a]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* %[[agep2]], i8 42, i32 %size,
|
|
; CHECK-NEXT: %[[dstcast1:.*]] = bitcast i8* %dst to i32*
|
|
; CHECK-NEXT: store i32 42, i32* %[[dstcast1]]
|
|
; CHECK-NEXT: %[[dstgep1:.*]] = getelementptr inbounds i8* %dst, i64 4
|
|
; CHECK-NEXT: %[[dstcast2:.*]] = bitcast i8* %[[dstgep1]] to i32*
|
|
; CHECK-NEXT: store i32 %[[srcload]], i32* %[[dstcast2]]
|
|
; CHECK-NEXT: %[[agep3:.*]] = getelementptr inbounds [34 x i8]* %[[a]], i64 0, i64 0
|
|
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[agep3]], i32 %size,
|
|
; CHECK-NEXT: ret void
|
|
|
|
entry:
|
|
%a = alloca [42 x i8]
|
|
%ptr = getelementptr [42 x i8]* %a, i32 0, i32 0
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 8, i32 1, i1 false)
|
|
%ptr2 = getelementptr [42 x i8]* %a, i32 0, i32 8
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr2, i8* %src, i32 %size, i32 1, i1 false)
|
|
call void @llvm.memset.p0i8.i32(i8* %ptr2, i8 42, i32 %size, i32 1, i1 false)
|
|
%cast = bitcast i8* %ptr to i32*
|
|
store i32 42, i32* %cast
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 8, i32 1, i1 false)
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr2, i32 %size, i32 1, i1 false)
|
|
ret void
|
|
}
|
|
|
|
%opaque = type opaque
|
|
|
|
define i32 @test19(%opaque* %x) {
|
|
; This input will cause us to try to compute a natural GEP when rewriting
|
|
; pointers in such a way that we try to GEP through the opaque type. Previously,
|
|
; a check for an unsized type was missing and this crashed. Ensure it behaves
|
|
; reasonably now.
|
|
; CHECK: @test19
|
|
; CHECK-NOT: alloca
|
|
; CHECK: ret i32 undef
|
|
|
|
entry:
|
|
%a = alloca { i64, i8* }
|
|
%cast1 = bitcast %opaque* %x to i8*
|
|
%cast2 = bitcast { i64, i8* }* %a to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %cast2, i8* %cast1, i32 16, i32 1, i1 false)
|
|
%gep = getelementptr inbounds { i64, i8* }* %a, i32 0, i32 0
|
|
%val = load i64* %gep
|
|
ret i32 undef
|
|
}
|
|
|
|
define i32 @test20() {
|
|
; Ensure we can track negative offsets (before the beginning of the alloca) and
|
|
; negative relative offsets from offsets starting past the end of the alloca.
|
|
; CHECK: @test20
|
|
; CHECK-NOT: alloca
|
|
; CHECK: %[[sum1:.*]] = add i32 1, 2
|
|
; CHECK: %[[sum2:.*]] = add i32 %[[sum1]], 3
|
|
; CHECK: ret i32 %[[sum2]]
|
|
|
|
entry:
|
|
%a = alloca [3 x i32]
|
|
%gep1 = getelementptr [3 x i32]* %a, i32 0, i32 0
|
|
store i32 1, i32* %gep1
|
|
%gep2.1 = getelementptr [3 x i32]* %a, i32 0, i32 -2
|
|
%gep2.2 = getelementptr i32* %gep2.1, i32 3
|
|
store i32 2, i32* %gep2.2
|
|
%gep3.1 = getelementptr [3 x i32]* %a, i32 0, i32 14
|
|
%gep3.2 = getelementptr i32* %gep3.1, i32 -12
|
|
store i32 3, i32* %gep3.2
|
|
|
|
%load1 = load i32* %gep1
|
|
%load2 = load i32* %gep2.2
|
|
%load3 = load i32* %gep3.2
|
|
%sum1 = add i32 %load1, %load2
|
|
%sum2 = add i32 %sum1, %load3
|
|
ret i32 %sum2
|
|
}
|
|
|
|
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
|
|
|
|
define i8 @test21() {
|
|
; Test allocations and offsets which border on overflow of the int64_t used
|
|
; internally. This is really awkward to really test as LLVM doesn't really
|
|
; support such extreme constructs cleanly.
|
|
; CHECK: @test21
|
|
; CHECK-NOT: alloca
|
|
; CHECK: or i8 -1, -1
|
|
|
|
entry:
|
|
%a = alloca [2305843009213693951 x i8]
|
|
%gep0 = getelementptr [2305843009213693951 x i8]* %a, i64 0, i64 2305843009213693949
|
|
store i8 255, i8* %gep0
|
|
%gep1 = getelementptr [2305843009213693951 x i8]* %a, i64 0, i64 -9223372036854775807
|
|
%gep2 = getelementptr i8* %gep1, i64 -1
|
|
call void @llvm.memset.p0i8.i64(i8* %gep2, i8 0, i64 18446744073709551615, i32 1, i1 false)
|
|
%gep3 = getelementptr i8* %gep1, i64 9223372036854775807
|
|
%gep4 = getelementptr i8* %gep3, i64 9223372036854775807
|
|
%gep5 = getelementptr i8* %gep4, i64 -6917529027641081857
|
|
store i8 255, i8* %gep5
|
|
%cast1 = bitcast i8* %gep4 to i32*
|
|
store i32 0, i32* %cast1
|
|
%load = load i8* %gep0
|
|
%gep6 = getelementptr i8* %gep0, i32 1
|
|
%load2 = load i8* %gep6
|
|
%result = or i8 %load, %load2
|
|
ret i8 %result
|
|
}
|
|
|
|
%test22.struct = type { i8 }
|
|
|
|
define void @test22() {
|
|
; CHECK: @test22
|
|
; CHECK-NOT: alloca
|
|
; CHECK: ret void
|
|
; PR13916
|
|
entry:
|
|
%A = alloca %test22.struct
|
|
br i1 undef, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry
|
|
%tmp = bitcast %test22.struct* %A to i8*
|
|
%tmp1 = bitcast %test22.struct* %A to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp, i8* %tmp1, i32 1, i32 1, i1 false)
|
|
unreachable
|
|
|
|
if.end: ; preds = %entry
|
|
%tmp2 = load %test22.struct* %A
|
|
ret void
|
|
}
|