mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-03 14:21:30 +00:00
42883d0ac4
ConstantExpr can evaluate to false even when isNullValue gives false. Fixes PR18143. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196611 91177308-0d34-0410-b5e6-96231b3b80d8
20 lines
490 B
LLVM
20 lines
490 B
LLVM
; 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
|
|
}
|
|
|