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| author | Chris Lattner <sabre@nondot.org> | 2010-09-04 00:12:30 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-09-04 00:12:30 +0000 |
| commit | 469996400c4ab89d5ddb2eb80acc1c1553439f07 (patch) | |
| tree | 88ca59ff06cd284aeb2c9ed88e203d5922cc4a86 /test/Transforms/LICM | |
| parent | 43c05744b58ff24fab998080680b5ba1e2120dec (diff) | |
| download | llvm-469996400c4ab89d5ddb2eb80acc1c1553439f07.tar.gz llvm-469996400c4ab89d5ddb2eb80acc1c1553439f07.tar.bz2 llvm-469996400c4ab89d5ddb2eb80acc1c1553439f07.tar.xz | |
fix a bug in my licm rewrite when a load from the promoted memory
location is being re-stored to the memory location. We would get
a dangling pointer from the SSAUpdate data structure and miss a
use. This fixes PR8068
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113042 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LICM')
| -rw-r--r-- | test/Transforms/LICM/crash.ll | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/test/Transforms/LICM/crash.ll b/test/Transforms/LICM/crash.ll new file mode 100644 index 0000000000..325f250bd5 --- /dev/null +++ b/test/Transforms/LICM/crash.ll @@ -0,0 +1,27 @@ +; RUN: opt -licm %s -disable-output + +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" +target triple = "x86_64-apple-darwin10.0.0" + + +; PR8068 +@g_12 = external global i8, align 1 +define void @test1() nounwind ssp { +entry: + br label %for.body + +for.body: ; preds = %for.cond, %bb.nph + store i8 0, i8* @g_12, align 1 + %tmp6 = load i8* @g_12, align 1 + br label %for.cond + +for.cond: ; preds = %for.body + store i8 %tmp6, i8* @g_12, align 1 + br i1 false, label %for.cond.for.end10_crit_edge, label %for.body + +for.cond.for.end10_crit_edge: ; preds = %for.cond + br label %for.end10 + +for.end10: ; preds = %for.cond.for.end10_crit_edge, %entry + ret void +} |