c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
93 lines
3.3 KiB
LLVM
93 lines
3.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -passes=gvn -S | FileCheck %s
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define i8 @test() nounwind {
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; CHECK-LABEL: define i8 @test(
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; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[P:%.*]] = alloca [32 x i8], align 1
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[P]])
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; CHECK-NEXT: store i8 1, ptr [[P]], align 1
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[P]])
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; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[P]], align 1
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; CHECK-NEXT: ret i8 [[TMP0]]
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;
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entry:
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%P = alloca [32 x i8]
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call void @llvm.lifetime.start.p0(ptr %P)
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%0 = load i8, ptr %P
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store i8 1, ptr %P
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call void @llvm.lifetime.end.p0(ptr %P)
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%1 = load i8, ptr %P
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ret i8 %1
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}
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define void @assume_eq_arg(ptr %arg) {
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; CHECK-LABEL: define void @assume_eq_arg(
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; CHECK-SAME: ptr [[ARG:%.*]]) {
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[ALLOCA]], [[ARG]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr [[ALLOCA]])
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; CHECK-NEXT: store volatile i32 0, ptr [[ALLOCA]], align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr [[ALLOCA]])
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; CHECK-NEXT: ret void
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;
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%alloca = alloca i32
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%cmp = icmp eq ptr %alloca, %arg
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call void @llvm.assume(i1 %cmp)
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call void @llvm.lifetime.start.p0(ptr %alloca)
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store volatile i32 0, ptr %alloca
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call void @llvm.lifetime.end.p0(ptr %alloca)
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ret void
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}
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define void @assume_eq_null() {
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; CHECK-LABEL: define void @assume_eq_null() {
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4, addrspace(1)
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[ALLOCA]], null
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: store volatile i32 0, ptr addrspace(1) null, align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: ret void
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;
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%alloca = alloca i32, addrspace(1)
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%cmp = icmp eq ptr addrspace(1) %alloca, null
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call void @llvm.assume(i1 %cmp)
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call void @llvm.lifetime.start.p1(ptr addrspace(1) %alloca)
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store volatile i32 0, ptr addrspace(1) %alloca
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call void @llvm.lifetime.end.p1(ptr addrspace(1) %alloca)
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ret void
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}
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define void @dom_eq_null() {
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; CHECK-LABEL: define void @dom_eq_null() {
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; CHECK-NEXT: [[ALLOCA:%.*]] = alloca i32, align 4, addrspace(1)
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[ALLOCA]], null
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; CHECK-NEXT: br i1 [[CMP]], label %[[IF:.*]], label %[[ELSE:.*]]
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; CHECK: [[IF]]:
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; CHECK-NEXT: call void @llvm.lifetime.start.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: store volatile i32 0, ptr addrspace(1) null, align 4
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; CHECK-NEXT: call void @llvm.lifetime.end.p1(ptr addrspace(1) [[ALLOCA]])
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; CHECK-NEXT: ret void
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; CHECK: [[ELSE]]:
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; CHECK-NEXT: ret void
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;
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%alloca = alloca i32, addrspace(1)
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%cmp = icmp eq ptr addrspace(1) %alloca, null
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br i1 %cmp, label %if, label %else
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if:
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call void @llvm.lifetime.start.p1(ptr addrspace(1) %alloca)
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store volatile i32 0, ptr addrspace(1) %alloca
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call void @llvm.lifetime.end.p1(ptr addrspace(1) %alloca)
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ret void
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else:
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ret void
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}
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declare void @llvm.lifetime.start.p0(ptr nocapture %P) readonly
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declare void @llvm.lifetime.end.p0(ptr nocapture %P)
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