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[InstCombine] Add missing test for icmp transformation (NFC) 

This was split out of D59378. There was no testing for the EQ case in
foldICmpWithDominatingICmp, add one here.

llvm-svn: 356463
This commit is contained in:
Teresa Johnson 2019-03-19 15:43:56 +00:00
parent da8c0e4a3c
commit bda581b831
1 changed files with 28 additions and 0 deletions
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28
llvm/test/Transforms/InstCombine/icmp-dom.ll
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@ -160,6 +160,34 @@ return:
ret void
}
define void @trueblock_cmp_eq(i32 %a, i32 %b) {
; CHECK-LABEL: @trueblock_cmp_eq(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A:%.*]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[RETURN:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A]], 1
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN3:%.*]], label [[RETURN]]
; CHECK: if.then3:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
%cmp = icmp sgt i32 %a, 0
br i1 %cmp, label %if.end, label %return
if.end:
%cmp1 = icmp slt i32 %a, 2
br i1 %cmp1, label %if.then3, label %return
if.then3:
br label %return
return:
ret void
}
define i1 @trueblock_cmp_is_false(i32 %x, i32 %y) {
; CHECK-LABEL: @trueblock_cmp_is_false(
; CHECK-NEXT: entry: