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Fix logic error optimizing "icmp pred (urem X, Y), Y" where pred is signed.

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Fixes PR16605.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186229 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2013-07-12 23:42:57 +00:00
parent 434c0bd2a5
commit 8a23270ce6
2 changed files with 16 additions and 5 deletions
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10
test/Transforms/InstSimplify/compare.ll
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@@ -480,7 +480,7 @@ define i1 @urem5(i16 %X, i32 %Y) {
%B = urem i32 %A, %Y
%C = icmp slt i32 %B, %Y
ret i1 %C
; CHECK: ret i1 true
; CHECK-NOT: ret i1 true
}
define i1 @urem6(i32 %X, i32 %Y) {
@@ -491,6 +491,14 @@ define i1 @urem6(i32 %X, i32 %Y) {
; CHECK: ret i1 true
}
define i1 @urem7(i32 %X) {
; CHECK: @urem7
%A = urem i32 1, %X
%B = icmp sgt i32 %A, %X
ret i1 %B
; CHECK-NOT: ret i1 false
}
define i1 @srem1(i32 %X) {
; CHECK: @srem1
%A = srem i32 %X, -5