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| author | Dan Gohman <sunfish@mozilla.com> | 2014-03-06 11:51:23 -0800 |
|---|---|---|
| committer | Dan Gohman <sunfish@mozilla.com> | 2014-03-06 11:54:11 -0800 |
| commit | d644d4a9ca114ceb5d6e69f0c0df6cd571bb33c4 (patch) | |
| tree | cf8470bae153163b847a30e90ce368434c9ea3b1 /test | |
| parent | e8e4da6a470cbb8d5b88144363bd76a1d4805a00 (diff) | |
Fix a use-after-free error in GlobalOpt CleanupConstantGlobalUsers
This is a backport of r197178 from LLVM trunk.
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/GlobalOpt/array-elem-refs.ll | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/Transforms/GlobalOpt/array-elem-refs.ll b/test/Transforms/GlobalOpt/array-elem-refs.ll new file mode 100644 index 0000000000..ec472b0e99 --- /dev/null +++ b/test/Transforms/GlobalOpt/array-elem-refs.ll @@ -0,0 +1,32 @@ +; RUN: opt < %s -S -globalopt | FileCheck %s +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" +target triple = "x86_64-unknown-linux-gnu" + +%struct.S = type { i8, i8 } + +@c = internal global i8** bitcast (i8* getelementptr (i8* bitcast ([8 x i8*]* @b to i8*), i64 48) to i8**), align 8 +@b = internal global [8 x i8*] [i8* null, i8* null, i8* null, i8* null, i8* null, i8* null, i8* getelementptr inbounds (%struct.S* @a, i32 0, i32 0), i8* getelementptr (i8* getelementptr inbounds (%struct.S* @a, i32 0, i32 0), i64 1)], align 16 +@a = internal global %struct.S zeroinitializer, align 1 + +; Function Attrs: nounwind uwtable +define signext i8 @foo() #0 { +entry: + %0 = load i8*** @c, align 8 + %1 = load i8** %0, align 8 + %2 = load i8* %1, align 1 + ret i8 %2 + +; CHECK-LABEL: @foo +; CHECK: ret i8 0 +} + +; Function Attrs: nounwind uwtable +define i32 @main() #0 { +entry: + %retval = alloca i32, align 4 + store i32 0, i32* %retval + ret i32 0 +} + +attributes #0 = { nounwind uwtable } + |