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).
97 lines
3.1 KiB
LLVM
97 lines
3.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -aa-pipeline=basic-aa -passes='function(tailcallelim),cgscc(inline,function(instcombine,dse))' -S | FileCheck %s
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; PR7272
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; Calls that capture byval parameters cannot be marked as tail calls. Other
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; tails that don't capture byval parameters can still be tail calls.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
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target triple = "i386-pc-linux-gnu"
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declare void @ext(ptr)
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define void @bar(ptr byval(i32) %x) {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: call void @ext(ptr nonnull [[X:%.*]])
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; CHECK-NEXT: ret void
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;
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call void @ext(ptr %x)
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ret void
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}
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define void @foo(ptr %x) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1
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; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4
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; CHECK-NEXT: call void @ext(ptr nonnull [[X1]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: ret void
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;
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call void @bar(ptr byval(i32) %x)
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ret void
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}
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define internal void @qux(ptr byval(i32) %x) {
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call void @ext(ptr %x)
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tail call void @ext(ptr null)
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ret void
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}
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define void @frob(ptr %x) {
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; CHECK-LABEL: @frob(
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; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1
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; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4
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; CHECK-NEXT: call void @ext(ptr nonnull [[X1]])
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; CHECK-NEXT: tail call void @ext(ptr null)
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: ret void
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;
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tail call void @qux(ptr byval(i32) %x)
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ret void
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}
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; A byval parameter passed into a function which is passed out as byval does
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; not block the call from being marked as tail.
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declare void @ext2(ptr byval(i32))
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define void @bar2(ptr byval(i32) %x) {
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; CHECK-LABEL: @bar2(
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; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X:%.*]])
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; CHECK-NEXT: ret void
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;
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call void @ext2(ptr byval(i32) %x)
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ret void
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}
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define void @foobar(ptr %x) {
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; CHECK-LABEL: @foobar(
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; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[X:%.*]], align 1
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; CHECK-NEXT: store i32 [[TMP2]], ptr [[X1]], align 4
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; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: ret void
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;
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tail call void @bar2(ptr byval(i32) %x)
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ret void
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}
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define void @barfoo() {
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; CHECK-LABEL: @barfoo(
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; CHECK-NEXT: [[X1:%.*]] = alloca i32, align 4
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: tail call void @ext2(ptr nonnull byval(i32) [[X1]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[X1]])
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; CHECK-NEXT: ret void
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;
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%x = alloca i32
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tail call void @bar2(ptr byval(i32) %x)
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ret void
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}
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