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| author | Bill Wendling <isanbard@gmail.com> | 2013-12-06 22:12:13 +0000 |
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| committer | Bill Wendling <isanbard@gmail.com> | 2013-12-06 22:12:13 +0000 |
| commit | 7b7037563b12589e675c655e5d1e4f737f50fa9d (patch) | |
| tree | bcb1a6c4ce979a6403646d9c586fc97862b38d8c /test | |
| parent | 1d0164e7ac8d1e23680a2c5139ba7b38af5b31c3 (diff) | |
| download | llvm-7b7037563b12589e675c655e5d1e4f737f50fa9d.tar.gz llvm-7b7037563b12589e675c655e5d1e4f737f50fa9d.tar.bz2 llvm-7b7037563b12589e675c655e5d1e4f737f50fa9d.tar.xz | |
Merging r196611:
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r196611 | dexonsmith | 2013-12-06 13:48:36 -0800 (Fri, 06 Dec 2013) | 5 lines
Don't use isNullValue to evaluate ConstantExpr
ConstantExpr can evaluate to false even when isNullValue gives false.
Fixes PR18143.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@196614 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/phi-select-constexpr.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/phi-select-constexpr.ll b/test/Transforms/InstCombine/phi-select-constexpr.ll new file mode 100644 index 0000000000..054e0691d4 --- /dev/null +++ b/test/Transforms/InstCombine/phi-select-constexpr.ll @@ -0,0 +1,19 @@ +; RUN: opt < %s -S -instcombine | FileCheck %s +@A = extern_weak global i32, align 4 +@B = extern_weak global i32, align 4 + +define i32 @foo(i1 %which) { +entry: + br i1 %which, label %final, label %delay + +delay: + br label %final + +; CHECK-LABEL: final: +; CHECK: phi i32 [ 1, %entry ], [ select (i1 icmp eq (i32* @A, i32* @B), i32 2, i32 1), %delay ] +final: + %use2 = phi i1 [ false, %entry ], [ icmp eq (i32* @A, i32* @B), %delay ] + %value = select i1 %use2, i32 2, i32 1 + ret i32 %value +} + |