forked from OSchip/llvm-project
60 lines
2.8 KiB
LLVM
60 lines
2.8 KiB
LLVM
; RUN: opt < %s -data-layout="e-p:32:32:32-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-n8:16:32" -basicaa -newgvn -S -die | FileCheck %s
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; RUN: opt < %s -data-layout="E-p:32:32:32-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-n32" -basicaa -newgvn -S -die | FileCheck %s
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; memset -> i16 forwarding.
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define signext i16 @memset_to_i16_local(i16* %A) nounwind ssp {
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entry:
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%conv = bitcast i16* %A to i8*
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tail call void @llvm.memset.p0i8.i64(i8* %conv, i8 1, i64 200, i1 false)
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%arrayidx = getelementptr inbounds i16, i16* %A, i64 42
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%tmp2 = load i16, i16* %arrayidx
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ret i16 %tmp2
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; CHECK-LABEL: @memset_to_i16_local(
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; CHECK-NOT: load
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; CHECK: ret i16 257
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}
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@GCst = constant {i32, float, i32 } { i32 42, float 14., i32 97 }
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@GCst_as1 = addrspace(1) constant {i32, float, i32 } { i32 42, float 14., i32 97 }
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; memset -> float forwarding.
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define float @memcpy_to_float_local(float* %A) nounwind ssp {
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entry:
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%conv = bitcast float* %A to i8* ; <i8*> [#uses=1]
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %conv, i8* bitcast ({i32, float, i32 }* @GCst to i8*), i64 12, i1 false)
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%arrayidx = getelementptr inbounds float, float* %A, i64 1 ; <float*> [#uses=1]
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%tmp2 = load float, float* %arrayidx ; <float> [#uses=1]
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ret float %tmp2
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; CHECK-LABEL: @memcpy_to_float_local(
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; CHECK-NOT: load
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; CHECK: ret float 1.400000e+01
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}
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; memcpy from address space 1
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define float @memcpy_to_float_local_as1(float* %A) nounwind ssp {
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entry:
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%conv = bitcast float* %A to i8* ; <i8*> [#uses=1]
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tail call void @llvm.memcpy.p0i8.p1i8.i64(i8* %conv, i8 addrspace(1)* bitcast ({i32, float, i32 } addrspace(1)* @GCst_as1 to i8 addrspace(1)*), i64 12, i1 false)
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%arrayidx = getelementptr inbounds float, float* %A, i64 1 ; <float*> [#uses=1]
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%tmp2 = load float, float* %arrayidx ; <float> [#uses=1]
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ret float %tmp2
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; CHECK-LABEL: @memcpy_to_float_local_as1(
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; CHECK-NOT: load
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; CHECK: ret float 1.400000e+01
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}
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; PR6642
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define i32 @memset_to_load() nounwind readnone {
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entry:
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%x = alloca [256 x i32], align 4 ; <[256 x i32]*> [#uses=2]
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%tmp = bitcast [256 x i32]* %x to i8* ; <i8*> [#uses=1]
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call void @llvm.memset.p0i8.i64(i8* align 4 %tmp, i8 0, i64 1024, i1 false)
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%arraydecay = getelementptr inbounds [256 x i32], [256 x i32]* %x, i32 0, i32 0 ; <i32*>
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%tmp1 = load i32, i32* %arraydecay ; <i32> [#uses=1]
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ret i32 %tmp1
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; CHECK-LABEL: @memset_to_load(
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; CHECK: ret i32 0
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}
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
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declare void @llvm.memcpy.p0i8.p1i8.i64(i8* nocapture, i8 addrspace(1)* nocapture, i64, i1) nounwind
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