forked from OSchip/llvm-project
857 lines
28 KiB
LLVM
857 lines
28 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=sroa -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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define i32 @test1() {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = icmp sle i32 0, 1
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; CHECK-NEXT: br i1 [[COND]], label [[THEN:%.*]], label [[EXIT:%.*]]
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; CHECK: then:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[PHI_SROA_SPECULATED:%.*]] = phi i32 [ 1, [[THEN]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret i32 [[PHI_SROA_SPECULATED]]
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;
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entry:
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%a = alloca [2 x i32]
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%a0 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 0, i32* %a0
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store i32 1, i32* %a1
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%v0 = load i32, i32* %a0
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%v1 = load i32, i32* %a1
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%cond = icmp sle i32 %v0, %v1
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br i1 %cond, label %then, label %exit
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then:
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br label %exit
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exit:
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%phi = phi i32* [ %a1, %then ], [ %a0, %entry ]
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%result = load i32, i32* %phi
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ret i32 %result
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}
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define i32 @test2() {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = icmp sle i32 0, 1
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; CHECK-NEXT: [[RESULT_SROA_SPECULATED:%.*]] = select i1 [[COND]], i32 1, i32 0
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; CHECK-NEXT: ret i32 [[RESULT_SROA_SPECULATED]]
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;
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entry:
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%a = alloca [2 x i32]
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%a0 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 0, i32* %a0
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store i32 1, i32* %a1
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%v0 = load i32, i32* %a0
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%v1 = load i32, i32* %a1
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%cond = icmp sle i32 %v0, %v1
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%select = select i1 %cond, i32* %a1, i32* %a0
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%result = load i32, i32* %select
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ret i32 %result
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}
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define float @test2_bitcast() {
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; CHECK-LABEL: @test2_bitcast(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = icmp sle i32 0, 1
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32 1 to float
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32 0 to float
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; CHECK-NEXT: [[RESULT_SROA_SPECULATED:%.*]] = select i1 [[COND]], float [[TMP0]], float [[TMP1]]
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; CHECK-NEXT: ret float [[RESULT_SROA_SPECULATED]]
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;
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entry:
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%a = alloca [2 x i32]
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%a0 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 0, i32* %a0
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store i32 1, i32* %a1
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%v0 = load i32, i32* %a0
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%v1 = load i32, i32* %a1
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%cond = icmp sle i32 %v0, %v1
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%select = select i1 %cond, i32* %a1, i32* %a0
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%select.bc = bitcast i32* %select to float*
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%result = load float, float* %select.bc
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ret float %result
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}
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define i32 @test2_addrspacecast() {
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; CHECK-LABEL: @test2_addrspacecast(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A_SROA_0:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[A_SROA_3:%.*]] = alloca i32, align 4
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; CHECK-NEXT: store i32 0, i32* [[A_SROA_0]], align 4
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; CHECK-NEXT: store i32 1, i32* [[A_SROA_3]], align 4
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; CHECK-NEXT: [[A_SROA_0_0_A_SROA_0_0_V0:%.*]] = load i32, i32* [[A_SROA_0]], align 4
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; CHECK-NEXT: [[A_SROA_3_0_A_SROA_3_4_V1:%.*]] = load i32, i32* [[A_SROA_3]], align 4
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; CHECK-NEXT: [[COND:%.*]] = icmp sle i32 [[A_SROA_0_0_A_SROA_0_0_V0]], [[A_SROA_3_0_A_SROA_3_4_V1]]
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; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[COND]], i32* [[A_SROA_3]], i32* [[A_SROA_0]]
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; CHECK-NEXT: [[SELECT_ASC:%.*]] = addrspacecast i32* [[SELECT]] to i32 addrspace(1)*
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; CHECK-NEXT: [[RESULT:%.*]] = load i32, i32 addrspace(1)* [[SELECT_ASC]], align 4
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; CHECK-NEXT: ret i32 [[RESULT]]
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;
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entry:
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%a = alloca [2 x i32]
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%a0 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 0, i32* %a0
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store i32 1, i32* %a1
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%v0 = load i32, i32* %a0
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%v1 = load i32, i32* %a1
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%cond = icmp sle i32 %v0, %v1
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%select = select i1 %cond, i32* %a1, i32* %a0
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%select.asc = addrspacecast i32* %select to i32 addrspace(1)*
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%result = load i32, i32 addrspace(1)* %select.asc
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ret i32 %result
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}
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define i32 @test3(i32 %x) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i32 [[X:%.*]], label [[BB0:%.*]] [
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; CHECK-NEXT: i32 1, label [[BB1:%.*]]
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; CHECK-NEXT: i32 2, label [[BB2:%.*]]
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; CHECK-NEXT: i32 3, label [[BB3:%.*]]
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; CHECK-NEXT: i32 4, label [[BB4:%.*]]
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; CHECK-NEXT: i32 5, label [[BB5:%.*]]
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; CHECK-NEXT: i32 6, label [[BB6:%.*]]
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; CHECK-NEXT: i32 7, label [[BB7:%.*]]
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; CHECK-NEXT: ]
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; CHECK: bb0:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: bb3:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: bb4:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: bb5:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: bb6:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: bb7:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[PHI_SROA_SPECULATED:%.*]] = phi i32 [ 1, [[BB0]] ], [ 0, [[BB1]] ], [ 0, [[BB2]] ], [ 1, [[BB3]] ], [ 1, [[BB4]] ], [ 0, [[BB5]] ], [ 0, [[BB6]] ], [ 1, [[BB7]] ]
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; CHECK-NEXT: ret i32 [[PHI_SROA_SPECULATED]]
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;
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entry:
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%a = alloca [2 x i32]
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; Note that we build redundant GEPs here to ensure that having different GEPs
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; into the same alloca partation continues to work with PHI speculation. This
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; was the underlying cause of PR13926.
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%a0 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a0b = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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%a1b = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 0, i32* %a0
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store i32 1, i32* %a1
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switch i32 %x, label %bb0 [ i32 1, label %bb1
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i32 2, label %bb2
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i32 3, label %bb3
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i32 4, label %bb4
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i32 5, label %bb5
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i32 6, label %bb6
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i32 7, label %bb7 ]
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bb0:
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br label %exit
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bb1:
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br label %exit
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bb2:
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br label %exit
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bb3:
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br label %exit
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bb4:
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br label %exit
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bb5:
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br label %exit
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bb6:
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br label %exit
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bb7:
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br label %exit
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exit:
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%phi = phi i32* [ %a1, %bb0 ], [ %a0, %bb1 ], [ %a0, %bb2 ], [ %a1, %bb3 ],
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[ %a1b, %bb4 ], [ %a0b, %bb5 ], [ %a0b, %bb6 ], [ %a1b, %bb7 ]
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%result = load i32, i32* %phi
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ret i32 %result
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}
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define i32 @test4() {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%a = alloca [2 x i32]
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%a0 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 0
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 0, i32* %a0
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store i32 1, i32* %a1
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%v0 = load i32, i32* %a0
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%v1 = load i32, i32* %a1
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%cond = icmp sle i32 %v0, %v1
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%select = select i1 %cond, i32* %a0, i32* %a0
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%result = load i32, i32* %select
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ret i32 %result
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}
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define i32 @test5(i32* %b) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret i32 1
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;
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entry:
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%a = alloca [2 x i32]
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 1, i32* %a1
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%select = select i1 true, i32* %a1, i32* %b
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%result = load i32, i32* %select
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ret i32 %result
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}
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declare void @f(i32*, i32*)
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define i32 @test6(i32* %b) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SELECT2:%.*]] = select i1 false, i32* poison, i32* [[B:%.*]]
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; CHECK-NEXT: [[SELECT3:%.*]] = select i1 false, i32* poison, i32* [[B]]
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; CHECK-NEXT: call void @f(i32* [[SELECT2]], i32* [[SELECT3]])
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; CHECK-NEXT: ret i32 1
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;
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entry:
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%a = alloca [2 x i32]
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%c = alloca i32
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%a1 = getelementptr [2 x i32], [2 x i32]* %a, i64 0, i32 1
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store i32 1, i32* %a1
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%select = select i1 true, i32* %a1, i32* %b
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%select2 = select i1 false, i32* %a1, i32* %b
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%select3 = select i1 false, i32* %c, i32* %b
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; Note, this would potentially escape the alloca pointer except for the
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; constant folding of the select.
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call void @f(i32* %select2, i32* %select3)
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%result = load i32, i32* %select
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%dead = load i32, i32* %c
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ret i32 %result
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}
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define i32 @test7() {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 undef, label [[GOOD:%.*]], label [[BAD:%.*]]
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; CHECK: good:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: bad:
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; CHECK-NEXT: [[P_SROA_SPECULATE_LOAD_BAD:%.*]] = load i32, i32* poison, align 4
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[P_SROA_SPECULATED:%.*]] = phi i32 [ 0, [[GOOD]] ], [ [[P_SROA_SPECULATE_LOAD_BAD]], [[BAD]] ]
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; CHECK-NEXT: ret i32 [[P_SROA_SPECULATED]]
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;
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entry:
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%X = alloca i32
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br i1 undef, label %good, label %bad
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good:
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%Y1 = getelementptr i32, i32* %X, i64 0
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store i32 0, i32* %Y1
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br label %exit
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bad:
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%Y2 = getelementptr i32, i32* %X, i64 1
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store i32 0, i32* %Y2
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br label %exit
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exit:
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%P = phi i32* [ %Y1, %good ], [ %Y2, %bad ]
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%Z2 = load i32, i32* %P
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ret i32 %Z2
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}
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define i32 @test8(i32 %b, i32* %ptr) {
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; Ensure that we rewrite allocas to the used type when that use is hidden by
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; a PHI that can be speculated.
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TEST:%.*]] = icmp ne i32 [[B:%.*]], 0
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; CHECK-NEXT: br i1 [[TEST]], label [[THEN:%.*]], label [[ELSE:%.*]]
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; CHECK: then:
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; CHECK-NEXT: [[PHI_SROA_SPECULATE_LOAD_THEN:%.*]] = load i32, i32* [[PTR:%.*]], align 4
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: else:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[PHI_SROA_SPECULATED:%.*]] = phi i32 [ undef, [[ELSE]] ], [ [[PHI_SROA_SPECULATE_LOAD_THEN]], [[THEN]] ]
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; CHECK-NEXT: ret i32 [[PHI_SROA_SPECULATED]]
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;
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entry:
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%f = alloca float
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%test = icmp ne i32 %b, 0
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br i1 %test, label %then, label %else
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then:
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br label %exit
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else:
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%bitcast = bitcast float* %f to i32*
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br label %exit
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exit:
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%phi = phi i32* [ %bitcast, %else ], [ %ptr, %then ]
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%loaded = load i32, i32* %phi, align 4
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ret i32 %loaded
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}
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define i32 @test9(i32 %b, i32* %ptr) {
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; Same as @test8 but for a select rather than a PHI node.
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 0, i32* [[PTR:%.*]], align 4
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; CHECK-NEXT: [[TEST:%.*]] = icmp ne i32 [[B:%.*]], 0
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; CHECK-NEXT: [[LOADED_SROA_SPECULATE_LOAD_FALSE:%.*]] = load i32, i32* [[PTR]], align 4
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; CHECK-NEXT: [[LOADED_SROA_SPECULATED:%.*]] = select i1 [[TEST]], i32 undef, i32 [[LOADED_SROA_SPECULATE_LOAD_FALSE]]
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; CHECK-NEXT: ret i32 [[LOADED_SROA_SPECULATED]]
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;
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entry:
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%f = alloca float
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store i32 0, i32* %ptr
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%test = icmp ne i32 %b, 0
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%bitcast = bitcast float* %f to i32*
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%select = select i1 %test, i32* %bitcast, i32* %ptr
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%loaded = load i32, i32* %select, align 4
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ret i32 %loaded
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}
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define float @test10(i32 %b, float* %ptr) {
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; Don't try to promote allocas which are not elligible for it even after
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; rewriting due to the necessity of inserting bitcasts when speculating a PHI
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; node.
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[F:%.*]] = alloca double, align 8
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; CHECK-NEXT: store double 0.000000e+00, double* [[F]], align 8
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; CHECK-NEXT: [[TEST:%.*]] = icmp ne i32 [[B:%.*]], 0
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; CHECK-NEXT: br i1 [[TEST]], label [[THEN:%.*]], label [[ELSE:%.*]]
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; CHECK: then:
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; CHECK-NEXT: [[PHI_SROA_SPECULATE_LOAD_THEN:%.*]] = load float, float* [[PTR:%.*]], align 4
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[F_0_F_0_BITCAST_SROA_CAST:%.*]] = bitcast double* [[F]] to float*
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; CHECK-NEXT: [[F_0_PHI_SROA_SPECULATE_LOAD_ELSE:%.*]] = load float, float* [[F_0_F_0_BITCAST_SROA_CAST]], align 8
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[PHI_SROA_SPECULATED:%.*]] = phi float [ [[F_0_PHI_SROA_SPECULATE_LOAD_ELSE]], [[ELSE]] ], [ [[PHI_SROA_SPECULATE_LOAD_THEN]], [[THEN]] ]
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; CHECK-NEXT: ret float [[PHI_SROA_SPECULATED]]
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;
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entry:
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%f = alloca double
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store double 0.0, double* %f
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%test = icmp ne i32 %b, 0
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br i1 %test, label %then, label %else
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then:
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br label %exit
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else:
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%bitcast = bitcast double* %f to float*
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br label %exit
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exit:
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%phi = phi float* [ %bitcast, %else ], [ %ptr, %then ]
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%loaded = load float, float* %phi, align 4
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ret float %loaded
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}
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define float @test11(i32 %b, float* %ptr) {
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; Same as @test10 but for a select rather than a PHI node.
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[F:%.*]] = alloca double, align 8
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; CHECK-NEXT: store double 0.000000e+00, double* [[F]], align 8
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; CHECK-NEXT: store float 0.000000e+00, float* [[PTR:%.*]], align 4
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; CHECK-NEXT: [[TEST:%.*]] = icmp ne i32 [[B:%.*]], 0
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; CHECK-NEXT: [[F_0_F_0_BITCAST_SROA_CAST:%.*]] = bitcast double* [[F]] to float*
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; CHECK-NEXT: [[F_0_LOADED_SROA_SPECULATE_LOAD_TRUE:%.*]] = load float, float* [[F_0_F_0_BITCAST_SROA_CAST]], align 8
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; CHECK-NEXT: [[LOADED_SROA_SPECULATE_LOAD_FALSE:%.*]] = load float, float* [[PTR]], align 4
|
|
; CHECK-NEXT: [[LOADED_SROA_SPECULATED:%.*]] = select i1 [[TEST]], float [[F_0_LOADED_SROA_SPECULATE_LOAD_TRUE]], float [[LOADED_SROA_SPECULATE_LOAD_FALSE]]
|
|
; CHECK-NEXT: ret float [[LOADED_SROA_SPECULATED]]
|
|
;
|
|
|
|
entry:
|
|
%f = alloca double
|
|
store double 0.0, double* %f
|
|
store float 0.0, float* %ptr
|
|
%test = icmp ne i32 %b, 0
|
|
%bitcast = bitcast double* %f to float*
|
|
%select = select i1 %test, float* %bitcast, float* %ptr
|
|
%loaded = load float, float* %select, align 4
|
|
ret float %loaded
|
|
}
|
|
|
|
define i32 @test12(i32 %x, i32* %p) {
|
|
; Ensure we don't crash or fail to nuke dead selects of allocas if no load is
|
|
; never found.
|
|
; CHECK-LABEL: @test12(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: ret i32 [[X:%.*]]
|
|
;
|
|
|
|
entry:
|
|
%a = alloca i32
|
|
store i32 %x, i32* %a
|
|
%dead = select i1 undef, i32* %a, i32* %p
|
|
%load = load i32, i32* %a
|
|
ret i32 %load
|
|
}
|
|
|
|
define i32 @test13(i32 %x, i32* %p) {
|
|
; Ensure we don't crash or fail to nuke dead phis of allocas if no load is ever
|
|
; found.
|
|
; CHECK-LABEL: @test13(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: br i1 undef, label [[LOOP]], label [[EXIT:%.*]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret i32 [[X:%.*]]
|
|
;
|
|
|
|
entry:
|
|
%a = alloca i32
|
|
store i32 %x, i32* %a
|
|
br label %loop
|
|
|
|
loop:
|
|
%phi = phi i32* [ %p, %entry ], [ %a, %loop ]
|
|
br i1 undef, label %loop, label %exit
|
|
|
|
exit:
|
|
%load = load i32, i32* %a
|
|
ret i32 %load
|
|
}
|
|
|
|
define i32 @test14(i1 %b1, i1 %b2, i32* %ptr) {
|
|
; Check for problems when there are both selects and phis and one is
|
|
; speculatable toward promotion but the other is not. That should block all of
|
|
; the speculation.
|
|
; CHECK-LABEL: @test14(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[F:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: [[G:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: store i32 0, i32* [[F]], align 4
|
|
; CHECK-NEXT: store i32 0, i32* [[G]], align 4
|
|
; CHECK-NEXT: [[F_SELECT:%.*]] = select i1 [[B1:%.*]], i32* [[F]], i32* [[PTR:%.*]]
|
|
; CHECK-NEXT: br i1 [[B2:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
|
|
; CHECK: then:
|
|
; CHECK-NEXT: br label [[EXIT:%.*]]
|
|
; CHECK: else:
|
|
; CHECK-NEXT: br label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[F_PHI:%.*]] = phi i32* [ [[F]], [[THEN]] ], [ [[F_SELECT]], [[ELSE]] ]
|
|
; CHECK-NEXT: [[G_PHI:%.*]] = phi i32* [ [[G]], [[THEN]] ], [ [[PTR]], [[ELSE]] ]
|
|
; CHECK-NEXT: [[F_LOADED:%.*]] = load i32, i32* [[F_PHI]], align 4
|
|
; CHECK-NEXT: [[G_SELECT:%.*]] = select i1 [[B1]], i32* [[G]], i32* [[G_PHI]]
|
|
; CHECK-NEXT: [[G_LOADED:%.*]] = load i32, i32* [[G_SELECT]], align 4
|
|
; CHECK-NEXT: [[RESULT:%.*]] = add i32 [[F_LOADED]], [[G_LOADED]]
|
|
; CHECK-NEXT: ret i32 [[RESULT]]
|
|
;
|
|
|
|
entry:
|
|
%f = alloca i32
|
|
%g = alloca i32
|
|
store i32 0, i32* %f
|
|
store i32 0, i32* %g
|
|
%f.select = select i1 %b1, i32* %f, i32* %ptr
|
|
br i1 %b2, label %then, label %else
|
|
|
|
then:
|
|
br label %exit
|
|
|
|
else:
|
|
br label %exit
|
|
|
|
exit:
|
|
%f.phi = phi i32* [ %f, %then ], [ %f.select, %else ]
|
|
%g.phi = phi i32* [ %g, %then ], [ %ptr, %else ]
|
|
%f.loaded = load i32, i32* %f.phi
|
|
%g.select = select i1 %b1, i32* %g, i32* %g.phi
|
|
%g.loaded = load i32, i32* %g.select
|
|
%result = add i32 %f.loaded, %g.loaded
|
|
ret i32 %result
|
|
}
|
|
|
|
define i32 @PR13905() {
|
|
; Check a pattern where we have a chain of dead phi nodes to ensure they are
|
|
; deleted and promotion can proceed.
|
|
; CHECK-LABEL: @PR13905(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 undef, label [[LOOP1:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: loop1:
|
|
; CHECK-NEXT: br i1 undef, label [[LOOP1]], label [[LOOP2:%.*]]
|
|
; CHECK: loop2:
|
|
; CHECK-NEXT: br i1 undef, label [[LOOP1]], label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[PHI2:%.*]] = phi i32* [ poison, [[LOOP2]] ], [ null, [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i32 undef
|
|
;
|
|
|
|
entry:
|
|
%h = alloca i32
|
|
store i32 0, i32* %h
|
|
br i1 undef, label %loop1, label %exit
|
|
|
|
loop1:
|
|
%phi1 = phi i32* [ null, %entry ], [ %h, %loop1 ], [ %h, %loop2 ]
|
|
br i1 undef, label %loop1, label %loop2
|
|
|
|
loop2:
|
|
br i1 undef, label %loop1, label %exit
|
|
|
|
exit:
|
|
%phi2 = phi i32* [ %phi1, %loop2 ], [ null, %entry ]
|
|
ret i32 undef
|
|
}
|
|
|
|
define i32 @PR13906() {
|
|
; Another pattern which can lead to crashes due to failing to clear out dead
|
|
; PHI nodes or select nodes. This triggers subtly differently from the above
|
|
; cases because the PHI node is (recursively) alive, but the select is dead.
|
|
; CHECK-LABEL: @PR13906(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br i1 undef, label [[IF_THEN:%.*]], label [[FOR_COND]]
|
|
; CHECK: if.then:
|
|
; CHECK-NEXT: br label [[FOR_COND]]
|
|
;
|
|
|
|
entry:
|
|
%c = alloca i32
|
|
store i32 0, i32* %c
|
|
br label %for.cond
|
|
|
|
for.cond:
|
|
%d.0 = phi i32* [ undef, %entry ], [ %c, %if.then ], [ %d.0, %for.cond ]
|
|
br i1 undef, label %if.then, label %for.cond
|
|
|
|
if.then:
|
|
%tmpcast.d.0 = select i1 undef, i32* %c, i32* %d.0
|
|
br label %for.cond
|
|
}
|
|
|
|
define i64 @PR14132(i1 %flag) {
|
|
; CHECK-LABEL: @PR14132(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[FLAG:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
|
|
; CHECK: if.then:
|
|
; CHECK-NEXT: [[B_0_LOAD_EXT:%.*]] = zext i8 1 to i64
|
|
; CHECK-NEXT: br label [[IF_END]]
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: [[PTR_0_SROA_SPECULATED:%.*]] = phi i64 [ [[B_0_LOAD_EXT]], [[IF_THEN]] ], [ 0, [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i64 [[PTR_0_SROA_SPECULATED]]
|
|
;
|
|
; Here we form a PHI-node by promoting the pointer alloca first, and then in
|
|
; order to promote the other two allocas, we speculate the load of the
|
|
; now-phi-node-pointer. In doing so we end up loading a 64-bit value from an i8
|
|
; alloca. While this is a bit dubious, we were asserting on trying to
|
|
; rewrite it. The trick is that the code using the value may carefully take
|
|
; steps to only use the not-undef bits, and so we need to at least loosely
|
|
; support this..
|
|
entry:
|
|
%a = alloca i64, align 8
|
|
%b = alloca i8, align 8
|
|
%ptr = alloca i64*, align 8
|
|
|
|
%ptr.cast = bitcast i64** %ptr to i8**
|
|
store i64 0, i64* %a, align 8
|
|
store i8 1, i8* %b, align 8
|
|
store i64* %a, i64** %ptr, align 8
|
|
br i1 %flag, label %if.then, label %if.end
|
|
|
|
if.then:
|
|
store i8* %b, i8** %ptr.cast, align 8
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%tmp = load i64*, i64** %ptr, align 8
|
|
%result = load i64, i64* %tmp, align 8
|
|
|
|
ret i64 %result
|
|
}
|
|
|
|
define float @PR16687(i64 %x, i1 %flag) {
|
|
; CHECK-LABEL: @PR16687(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[A_SROA_0_0_EXTRACT_TRUNC:%.*]] = trunc i64 [[X:%.*]] to i32
|
|
; CHECK-NEXT: [[A_SROA_2_0_EXTRACT_SHIFT:%.*]] = lshr i64 [[X]], 32
|
|
; CHECK-NEXT: [[A_SROA_2_0_EXTRACT_TRUNC:%.*]] = trunc i64 [[A_SROA_2_0_EXTRACT_SHIFT]] to i32
|
|
; CHECK-NEXT: br i1 [[FLAG:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
|
|
; CHECK: then:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32 [[A_SROA_0_0_EXTRACT_TRUNC]] to float
|
|
; CHECK-NEXT: br label [[END:%.*]]
|
|
; CHECK: else:
|
|
; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32 [[A_SROA_2_0_EXTRACT_TRUNC]] to float
|
|
; CHECK-NEXT: br label [[END]]
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[A_PHI_F_SROA_SPECULATED:%.*]] = phi float [ [[TMP0]], [[THEN]] ], [ [[TMP1]], [[ELSE]] ]
|
|
; CHECK-NEXT: ret float [[A_PHI_F_SROA_SPECULATED]]
|
|
;
|
|
; Check that even when we try to speculate the same phi twice (in two slices)
|
|
; on an otherwise promotable construct, we don't get ahead of ourselves and try
|
|
; to promote one of the slices prior to speculating it.
|
|
|
|
entry:
|
|
%a = alloca i64, align 8
|
|
store i64 %x, i64* %a
|
|
br i1 %flag, label %then, label %else
|
|
|
|
then:
|
|
%a.f = bitcast i64* %a to float*
|
|
br label %end
|
|
|
|
else:
|
|
%a.raw = bitcast i64* %a to i8*
|
|
%a.raw.4 = getelementptr i8, i8* %a.raw, i64 4
|
|
%a.raw.4.f = bitcast i8* %a.raw.4 to float*
|
|
br label %end
|
|
|
|
end:
|
|
%a.phi.f = phi float* [ %a.f, %then ], [ %a.raw.4.f, %else ]
|
|
%f = load float, float* %a.phi.f
|
|
ret float %f
|
|
}
|
|
|
|
; Verifies we fixed PR20425. We should be able to promote all alloca's to
|
|
; registers in this test.
|
|
;
|
|
; %0 = slice
|
|
; %1 = slice
|
|
; %2 = phi(%0, %1) // == slice
|
|
define float @simplify_phi_nodes_that_equal_slice(i1 %cond, float* %temp) {
|
|
; CHECK-LABEL: @simplify_phi_nodes_that_equal_slice(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
|
|
; CHECK: then:
|
|
; CHECK-NEXT: br label [[MERGE:%.*]]
|
|
; CHECK: else:
|
|
; CHECK-NEXT: br label [[MERGE]]
|
|
; CHECK: merge:
|
|
; CHECK-NEXT: [[ARR_SROA_0_0:%.*]] = phi float [ 1.000000e+00, [[THEN]] ], [ 2.000000e+00, [[ELSE]] ]
|
|
; CHECK-NEXT: store float 0.000000e+00, float* [[TEMP:%.*]], align 4
|
|
; CHECK-NEXT: ret float [[ARR_SROA_0_0]]
|
|
;
|
|
entry:
|
|
%arr = alloca [4 x float], align 4
|
|
br i1 %cond, label %then, label %else
|
|
|
|
then:
|
|
%0 = getelementptr inbounds [4 x float], [4 x float]* %arr, i64 0, i64 3
|
|
store float 1.000000e+00, float* %0, align 4
|
|
br label %merge
|
|
|
|
else:
|
|
%1 = getelementptr inbounds [4 x float], [4 x float]* %arr, i64 0, i64 3
|
|
store float 2.000000e+00, float* %1, align 4
|
|
br label %merge
|
|
|
|
merge:
|
|
%2 = phi float* [ %0, %then ], [ %1, %else ]
|
|
store float 0.000000e+00, float* %temp, align 4
|
|
%3 = load float, float* %2, align 4
|
|
ret float %3
|
|
}
|
|
|
|
; A slightly complicated example for PR20425.
|
|
;
|
|
; %0 = slice
|
|
; %1 = phi(%0) // == slice
|
|
; %2 = slice
|
|
; %3 = phi(%1, %2) // == slice
|
|
define float @simplify_phi_nodes_that_equal_slice_2(i1 %cond, float* %temp) {
|
|
; CHECK-LABEL: @simplify_phi_nodes_that_equal_slice_2(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
|
|
; CHECK: then:
|
|
; CHECK-NEXT: br label [[THEN2:%.*]]
|
|
; CHECK: then2:
|
|
; CHECK-NEXT: br label [[MERGE:%.*]]
|
|
; CHECK: else:
|
|
; CHECK-NEXT: br label [[MERGE]]
|
|
; CHECK: merge:
|
|
; CHECK-NEXT: [[ARR_SROA_0_0:%.*]] = phi float [ 2.000000e+00, [[THEN2]] ], [ 3.000000e+00, [[ELSE]] ]
|
|
; CHECK-NEXT: store float 0.000000e+00, float* [[TEMP:%.*]], align 4
|
|
; CHECK-NEXT: ret float [[ARR_SROA_0_0]]
|
|
;
|
|
entry:
|
|
%arr = alloca [4 x float], align 4
|
|
br i1 %cond, label %then, label %else
|
|
|
|
then:
|
|
%0 = getelementptr inbounds [4 x float], [4 x float]* %arr, i64 0, i64 3
|
|
store float 1.000000e+00, float* %0, align 4
|
|
br label %then2
|
|
|
|
then2:
|
|
%1 = phi float* [ %0, %then ]
|
|
store float 2.000000e+00, float* %1, align 4
|
|
br label %merge
|
|
|
|
else:
|
|
%2 = getelementptr inbounds [4 x float], [4 x float]* %arr, i64 0, i64 3
|
|
store float 3.000000e+00, float* %2, align 4
|
|
br label %merge
|
|
|
|
merge:
|
|
%3 = phi float* [ %1, %then2 ], [ %2, %else ]
|
|
store float 0.000000e+00, float* %temp, align 4
|
|
%4 = load float, float* %3, align 4
|
|
ret float %4
|
|
}
|
|
|
|
%struct.S = type { i32 }
|
|
|
|
; Verifies we fixed PR20822. We have a foldable PHI feeding a speculatable PHI
|
|
; which requires the rewriting of the speculated PHI to handle insertion
|
|
; when the incoming pointer is itself from a PHI node. We would previously
|
|
; insert a bitcast instruction *before* a PHI, producing an invalid module;
|
|
; make sure we insert *after* the first non-PHI instruction.
|
|
define void @PR20822() {
|
|
; CHECK-LABEL: @PR20822(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[F_SROA_0:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: br i1 undef, label [[IF_END:%.*]], label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br label [[IF_END]]
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ undef, [[FOR_COND]] ]
|
|
; CHECK-NEXT: [[F_SROA_0_0_F2_SROA_CAST1:%.*]] = bitcast i32* [[F_SROA_0]] to %struct.S*
|
|
; CHECK-NEXT: br i1 undef, label [[IF_THEN5:%.*]], label [[IF_THEN2:%.*]]
|
|
; CHECK: if.then2:
|
|
; CHECK-NEXT: br label [[IF_THEN5]]
|
|
; CHECK: if.then5:
|
|
; CHECK-NEXT: [[F1:%.*]] = phi %struct.S* [ undef, [[IF_THEN2]] ], [ [[F_SROA_0_0_F2_SROA_CAST1]], [[IF_END]] ]
|
|
; CHECK-NEXT: [[DOTFCA_0_GEP:%.*]] = getelementptr inbounds [[STRUCT_S:%.*]], %struct.S* [[F1]], i32 0, i32 0
|
|
; CHECK-NEXT: store i32 undef, i32* [[DOTFCA_0_GEP]], align 4
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
%f = alloca %struct.S, align 4
|
|
br i1 undef, label %if.end, label %for.cond
|
|
|
|
for.cond: ; preds = %for.cond, %entry
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %for.cond, %entry
|
|
%f2 = phi %struct.S* [ %f, %entry ], [ %f, %for.cond ]
|
|
phi i32 [ undef, %entry ], [ undef, %for.cond ]
|
|
br i1 undef, label %if.then5, label %if.then2
|
|
|
|
if.then2: ; preds = %if.end
|
|
br label %if.then5
|
|
|
|
if.then5: ; preds = %if.then2, %if.end
|
|
%f1 = phi %struct.S* [ undef, %if.then2 ], [ %f2, %if.end ]
|
|
store %struct.S undef, %struct.S* %f1, align 4
|
|
ret void
|
|
}
|
|
|
|
define i32 @phi_align(i32* %z) {
|
|
; CHECK-LABEL: @phi_align(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[A_SROA_0:%.*]] = alloca [7 x i8], align 1
|
|
; CHECK-NEXT: [[A_SROA_0_3_A1_SROA_IDX:%.*]] = getelementptr inbounds [7 x i8], [7 x i8]* [[A_SROA_0]], i64 0, i64 3
|
|
; CHECK-NEXT: [[A_SROA_0_3_A1_SROA_CAST:%.*]] = bitcast i8* [[A_SROA_0_3_A1_SROA_IDX]] to i32*
|
|
; CHECK-NEXT: [[A_SROA_0_0_A0_SROA_CAST:%.*]] = bitcast [7 x i8]* [[A_SROA_0]] to i32*
|
|
; CHECK-NEXT: store i32 0, i32* [[A_SROA_0_0_A0_SROA_CAST]], align 1
|
|
; CHECK-NEXT: [[A_SROA_0_3_A1_SROA_IDX7:%.*]] = getelementptr inbounds [7 x i8], [7 x i8]* [[A_SROA_0]], i64 0, i64 3
|
|
; CHECK-NEXT: [[A_SROA_0_3_A1_SROA_CAST8:%.*]] = bitcast i8* [[A_SROA_0_3_A1_SROA_IDX7]] to i32*
|
|
; CHECK-NEXT: store i32 1, i32* [[A_SROA_0_3_A1_SROA_CAST8]], align 1
|
|
; CHECK-NEXT: [[A_SROA_0_0_A0_SROA_CAST6:%.*]] = bitcast [7 x i8]* [[A_SROA_0]] to i32*
|
|
; CHECK-NEXT: [[A_SROA_0_0_A_SROA_0_1_V0:%.*]] = load i32, i32* [[A_SROA_0_0_A0_SROA_CAST6]], align 1
|
|
; CHECK-NEXT: [[A_SROA_0_3_A1_SROA_IDX9:%.*]] = getelementptr inbounds [7 x i8], [7 x i8]* [[A_SROA_0]], i64 0, i64 3
|
|
; CHECK-NEXT: [[A_SROA_0_3_A1_SROA_CAST10:%.*]] = bitcast i8* [[A_SROA_0_3_A1_SROA_IDX9]] to i32*
|
|
; CHECK-NEXT: [[A_SROA_0_3_A_SROA_0_4_V1:%.*]] = load i32, i32* [[A_SROA_0_3_A1_SROA_CAST10]], align 1
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp sle i32 [[A_SROA_0_0_A_SROA_0_1_V0]], [[A_SROA_0_3_A_SROA_0_4_V1]]
|
|
; CHECK-NEXT: br i1 [[COND]], label [[THEN:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: then:
|
|
; CHECK-NEXT: br label [[EXIT]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[PHI:%.*]] = phi i32* [ [[A_SROA_0_3_A1_SROA_CAST]], [[THEN]] ], [ [[Z:%.*]], [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: [[RESULT:%.*]] = load i32, i32* [[PHI]], align 1
|
|
; CHECK-NEXT: ret i32 [[RESULT]]
|
|
;
|
|
entry:
|
|
%a = alloca [8 x i8], align 8
|
|
|
|
%a0x = getelementptr [8 x i8], [8 x i8]* %a, i64 0, i32 1
|
|
%a0 = bitcast i8* %a0x to i32*
|
|
%a1x = getelementptr [8 x i8], [8 x i8]* %a, i64 0, i32 4
|
|
%a1 = bitcast i8* %a1x to i32*
|
|
store i32 0, i32* %a0, align 1
|
|
store i32 1, i32* %a1, align 4
|
|
%v0 = load i32, i32* %a0, align 1
|
|
%v1 = load i32, i32* %a1, align 4
|
|
%cond = icmp sle i32 %v0, %v1
|
|
br i1 %cond, label %then, label %exit
|
|
|
|
then:
|
|
br label %exit
|
|
|
|
exit:
|
|
%phi = phi i32* [ %a1, %then ], [ %z, %entry ]
|
|
%result = load i32, i32* %phi, align 4
|
|
ret i32 %result
|
|
}
|
|
|
|
; Don't speculate a load based on an earlier volatile operation.
|
|
define i8 @volatile_select(i8* %p, i1 %b) {
|
|
; CHECK-LABEL: @volatile_select(
|
|
; CHECK-NEXT: [[P2:%.*]] = alloca i8, align 1
|
|
; CHECK-NEXT: store i8 0, i8* [[P2]], align 1
|
|
; CHECK-NEXT: store volatile i8 0, i8* [[P:%.*]], align 1
|
|
; CHECK-NEXT: [[PX:%.*]] = select i1 [[B:%.*]], i8* [[P]], i8* [[P2]]
|
|
; CHECK-NEXT: [[V2:%.*]] = load i8, i8* [[PX]], align 1
|
|
; CHECK-NEXT: ret i8 [[V2]]
|
|
;
|
|
%p2 = alloca i8
|
|
store i8 0, i8* %p2
|
|
store volatile i8 0, i8* %p
|
|
%px = select i1 %b, i8* %p, i8* %p2
|
|
%v2 = load i8, i8* %px
|
|
ret i8 %v2
|
|
}
|