6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

Optimize icmp of null and select of two constants even if the select has

Browse Source 
multiple uses.  (The construct in question was found in gcc.)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91675 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2009-12-18 08:22:35 +00:00
parent 400073d546
commit 97b087c778
2 changed files with 33 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
test/Transforms/InstCombine/2009-12-17-CmpSelectNull.ll Normal file
View File

@@ -0,0 +1,16 @@
; 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