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https://github.com/c64scene-ar/llvm-6502.git
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d9434ef62f
The new code does not create new basic blocks in the case when shadow is a compile-time constant; it generates either an unconditional __msan_warning call or nothing instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226569 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.5 KiB
LLVM
54 lines
1.5 KiB
LLVM
; RUN: opt < %s -msan -msan-check-access-address=0 -msan-check-constant-shadow=1 -msan-track-origins=1 -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-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Test that returning a literal undef from main() triggers an MSan warning.
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; main() is special: it inserts check for the return value
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define i32 @main() nounwind uwtable sanitize_memory {
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entry:
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ret i32 undef
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}
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; CHECK-LABEL: @main
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; CHECK: call void @__msan_warning_noreturn
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; CHECK: ret i32 undef
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; This function stores known initialized value.
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; Expect 2 stores: one for the shadow (0), one for the value (42), but no origin.
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define void @StoreConstant(i32* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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store i32 42, i32* %p, align 4
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ret void
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}
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; CHECK-LABEL: @StoreConstant
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; CHECK-NOT: store i32
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; CHECK: store i32 0,
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; CHECK-NOT: store i32
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; CHECK: store i32 42,
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; CHECK-NOT: store i32
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; CHECK: ret void
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; This function stores known uninitialized value.
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; Expect 3 stores: shadow, value and origin.
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; Expect no icmp(s): everything here is unconditional.
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define void @StoreUndef(i32* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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store i32 undef, i32* %p, align 4
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ret void
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}
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; CHECK-LABEL: @StoreUndef
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; CHECK-NOT: icmp
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; CHECK: store i32
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; CHECK-NOT: icmp
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; CHECK: store i32
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; CHECK-NOT: icmp
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; CHECK: store i32
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; CHECK-NOT: icmp
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; CHECK: ret void
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