13fc189fe1
X86/struct.ll, X86/array.ll and X86/array-aligned required manual updates to reorder instructions.
38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
; Test that safestack layout reuses a region w/o fragmentation.
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; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
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define void @f() safestack {
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; CHECK-LABEL: define void @f
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entry:
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; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
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; CHECK: getelementptr i8, ptr %[[USP]], i32 -16
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%x0 = alloca i64, align 8
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%x1 = alloca i8, align 1
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%x2 = alloca i64, align 8
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call void @llvm.lifetime.start.p0(i64 8, ptr %x0)
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call void @capture64(ptr %x0)
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call void @llvm.lifetime.end.p0(i64 8, ptr %x0)
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call void @llvm.lifetime.start.p0(i64 1, ptr %x1)
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call void @llvm.lifetime.start.p0(i64 8, ptr %x2)
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call void @capture8(ptr %x1)
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call void @capture64(ptr %x2)
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call void @llvm.lifetime.end.p0(i64 1, ptr %x1)
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call void @llvm.lifetime.end.p0(i64 8, ptr %x2)
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; Test that i64 allocas share space.
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; CHECK: getelementptr i8, ptr %unsafe_stack_ptr, i32 -8
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; CHECK: getelementptr i8, ptr %unsafe_stack_ptr, i32 -9
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; CHECK: getelementptr i8, ptr %unsafe_stack_ptr, i32 -8
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ret void
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}
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declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
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declare void @capture8(ptr)
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declare void @capture64(ptr)
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