Fix an off-by-one error in ctpop combining.
llvm-svn: 123664
diff --git a/llvm/test/CodeGen/X86/ctpop-combine.ll b/llvm/test/CodeGen/X86/ctpop-combine.ll
index b87637f..c957d38 100644
--- a/llvm/test/CodeGen/X86/ctpop-combine.ll
+++ b/llvm/test/CodeGen/X86/ctpop-combine.ll
@@ -18,8 +18,7 @@
define i32 @test2(i64 %x) nounwind readnone {
%count = tail call i64 @llvm.ctpop.i64(i64 %x)
- %cast = trunc i64 %count to i32
- %cmp = icmp ult i32 %cast, 2
+ %cmp = icmp ult i64 %count, 2
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: test2:
@@ -29,3 +28,13 @@
; CHECK: ret
}
+define i32 @test3(i64 %x) nounwind readnone {
+ %count = tail call i64 @llvm.ctpop.i64(i64 %x)
+ %cast = trunc i64 %count to i6 ; Too small for 0-64
+ %cmp = icmp ult i6 %cast, 2
+ %conv = zext i1 %cmp to i32
+ ret i32 %conv
+; CHECK: test3:
+; CHECK: cmpb $2
+; CHECK: ret
+}