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Add a test for the foldSelectICmpAndOr fix committed in r180779. 

This tests a case where C1 and C2 were the same but X and Y were different
widths.

llvm-svn: 180907
This commit is contained in:
David Majnemer 2013-05-02 02:44:23 +00:00
parent f85a76f477
commit a18dfe6b96
1 changed files with 13 additions and 0 deletions
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13
llvm/test/Transforms/InstCombine/select.ll
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@ -915,6 +915,19 @@ define i32 @select_icmp_eq_and_4096_0_or_4096(i32 %x, i32 %y) {
ret i32 %select
}
; CHECK: @select_icmp_eq_0_and_1_or_1
; CHECK-NEXT: [[AND:%[a-z0-9]+]] = and i64 %x, 1
; CHECK-NEXT: [[ZEXT:%[a-z0-9]+]] = trunc i64 [[AND]] to i32
; CHECK-NEXT: [[OR:%[a-z0-9]+]] = or i32 [[XOR]], %y
; CHECK-NEXT: ret i32 [[OR]]
define i32 @select_icmp_eq_0_and_1_or_1(i64 %x, i32 %y) {
%and = and i64 %x, 1
%cmp = icmp eq i64 %and, 0
%or = or i32 %y, 1
%select = select i1 %cmp, i32 %y, i32 %or
ret i32 %select
}
; CHECK: @select_icmp_ne_0_and_4096_or_32
; CHECK-NEXT: [[LSHR:%[a-z0-9]+]] = lshr i32 %x, 7
; CHECK-NEXT: [[AND:%[a-z0-9]+]] = and i32 [[LSHR]], 32