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llvm-mirror/test/Transforms/InstCombine/2009-12-17-CmpSelectNull.ll
Eli Friedman c8ab298dbd Optimize icmp of null and select of two constants even if the select has
multiple uses.  (The construct in question was found in gcc.)

llvm-svn: 91675
2009-12-18 08:22:35 +00:00

17 lines
595 B
LLVM

; RUN: opt < %s -instcombine -S | FileCheck %s
@.str254 = internal constant [2 x i8] c".\00"
@.str557 = internal constant [3 x i8] c"::\00"
define i8* @demangle_qualified(i32 %isfuncname) nounwind {
entry:
%tobool272 = icmp ne i32 %isfuncname, 0
%cond276 = select i1 %tobool272, i8* getelementptr inbounds ([2 x i8]* @.str254, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8]* @.str557, i32 0, i32 0) ; <i8*> [#uses=4]
%cmp.i504 = icmp eq i8* %cond276, null
%rval = getelementptr i8* %cond276, i1 %cmp.i504
ret i8* %rval
}
; CHECK: %cond276 = select i1
; CHECK: ret i8* %cond276