From 7b7037563b12589e675c655e5d1e4f737f50fa9d Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Fri, 6 Dec 2013 22:12:13 +0000 Subject: Merging r196611: ------------------------------------------------------------------------ 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. ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@196614 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstCombine/phi-select-constexpr.ll | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 test/Transforms/InstCombine/phi-select-constexpr.ll (limited to 'test/Transforms/InstCombine/phi-select-constexpr.ll') 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 +} + -- cgit v1.2.3