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).
67 lines
1.9 KiB
LLVM
67 lines
1.9 KiB
LLVM
; RUN: opt < %s -passes=partial-inliner -skip-partial-inlining-cost-analysis -S | FileCheck %s
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; RUN: opt < %s -passes=partial-inliner -skip-partial-inlining-cost-analysis -S | FileCheck %s
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%"class.base" = type { ptr }
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%"struct.base" = type opaque
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@g = external local_unnamed_addr global i32, align 4
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define i32 @callee_unknown_use2(i32 %arg) local_unnamed_addr #0 {
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; CHECK-LABEL:define{{.*}}@callee_unknown_use2.{{[0-9]}}
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; CHECK-NOT: alloca
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bb:
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%tmp = alloca i32, align 4
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%tmp1 = bitcast ptr %tmp to ptr
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%tmp2 = load i32, ptr @g, align 4, !tbaa !2
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%tmp3 = add nsw i32 %tmp2, 1
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%tmp4 = icmp slt i32 %arg, 0
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br i1 %tmp4, label %bb6, label %bb5
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bb5: ; preds = %bb
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call void @llvm.lifetime.start.p0(ptr nonnull %tmp) #2
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store i32 %tmp3, ptr %tmp, align 4, !tbaa !2
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store i32 %tmp3, ptr @g, align 4, !tbaa !2
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call void @bar(ptr nonnull %tmp) #2
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call void @llvm.lifetime.end.p0(ptr nonnull %tmp) #2
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br label %bb6
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bb6: ; preds = %bb5, %bb
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%tmp7 = phi i32 [ 1, %bb5 ], [ 0, %bb ]
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%tmp10 = bitcast ptr %tmp1 to ptr
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ret i32 %tmp7
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0(ptr nocapture) #1
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declare void @bar(ptr) local_unnamed_addr #2
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declare void @bar2(ptr, ptr) local_unnamed_addr #1
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0(ptr nocapture) #1
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; Function Attrs: nounwind uwtable
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define i32 @caller(i32 %arg) local_unnamed_addr #0 {
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bb:
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%tmp = tail call i32 @callee_unknown_use2(i32 %arg)
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ret i32 %tmp
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}
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attributes #0 = { nounwind uwtable}
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { nounwind }
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{!"clang version 5.0.0 (trunk 303574)"}
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!2 = !{!3, !3, i64 0}
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!3 = !{!"int", !4, i64 0}
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!4 = !{!"omnipotent char", !5, i64 0}
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!5 = !{!"Simple C/C++ TBAA"}
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