[llvm] f502ab7 - [InstCombine] Add test for #62450 (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2023-09-19T14:47:02+02:00
New Revision: f502ab7961b78d4b02e7cb61782c7bce7d6de074

URL: https://github.com/llvm/llvm-project/commit/f502ab7961b78d4b02e7cb61782c7bce7d6de074
DIFF: https://github.com/llvm/llvm-project/commit/f502ab7961b78d4b02e7cb61782c7bce7d6de074.diff

LOG: [InstCombine] Add test for #62450 (NFC)

Added: 
    

Modified: 
    llvm/test/Transforms/InstCombine/ctpop.ll

Removed: 
    


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diff  --git a/llvm/test/Transforms/InstCombine/ctpop.ll b/llvm/test/Transforms/InstCombine/ctpop.ll
index cf1d72383e69405..a3db7715d183453 100644
--- a/llvm/test/Transforms/InstCombine/ctpop.ll
+++ b/llvm/test/Transforms/InstCombine/ctpop.ll
@@ -475,3 +475,16 @@ define i32 @parity_xor_extra_use2(i32 %arg, i32 %arg1) {
   %i5 = xor i32 %i2, %i4
   ret i32 %i5
 }
+
+define i32 @select_ctpop_zero(i32 %x) {
+; CHECK-LABEL: @select_ctpop_zero(
+; CHECK-NEXT:    [[CTPOP:%.*]] = call i32 @llvm.ctpop.i32(i32 [[X:%.*]]), !range [[RNG1]]
+; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[X]], 0
+; CHECK-NEXT:    [[RES:%.*]] = select i1 [[CMP]], i32 0, i32 [[CTPOP]]
+; CHECK-NEXT:    ret i32 [[RES]]
+;
+  %ctpop = call i32 @llvm.ctpop.i32(i32 %x)
+  %cmp = icmp eq i32 %x, 0
+  %res = select i1 %cmp, i32 0, i32 %ctpop
+  ret i32 %res
+}