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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S < %s | FileCheck %s
define i32 @cttz_neg_value(i32 %x) {
; CHECK-LABEL: @cttz_neg_value(
; CHECK-NEXT: [[B:%.*]] = call range(i32 0, 33) i32 @llvm.cttz.i32(i32 [[X:%.*]], i1 false)
; CHECK-NEXT: ret i32 [[B]]
;
%a = sub i32 0, %x
%b = tail call i32 @llvm.cttz.i32(i32 %a)
ret i32 %b
}
define i32 @cttz_neg_value_multiuse(i32 %x) {
; CHECK-LABEL: @cttz_neg_value_multiuse(
; CHECK-NEXT: [[A:%.*]] = sub i32 0, [[X:%.*]]
; CHECK-NEXT: call void @use(i32 [[A]])
; CHECK-NEXT: [[B:%.*]] = call range(i32 0, 33) i32 @llvm.cttz.i32(i32 [[X]], i1 false)
; CHECK-NEXT: ret i32 [[B]]
;
%a = sub i32 0, %x
call void @use(i32 %a)
%b = tail call i32 @llvm.cttz.i32(i32 %a)
ret i32 %b
}
define i64 @cttz_neg_value_64(i64 %x) {
; CHECK-LABEL: @cttz_neg_value_64(
; CHECK-NEXT: [[B:%.*]] = tail call range(i64 0, 65) i64 @llvm.cttz.i64(i64 [[X:%.*]], i1 true)
; CHECK-NEXT: ret i64 [[B]]
;
%a = sub i64 0, %x
%b = tail call i64 @llvm.cttz.i64(i64 %a, i1 true)
ret i64 %b
}
define i64 @cttz_neg_value2_64(i64 %x) {
; CHECK-LABEL: @cttz_neg_value2_64(
; CHECK-NEXT: [[B:%.*]] = tail call range(i64 0, 65) i64 @llvm.cttz.i64(i64 [[X:%.*]], i1 false)
; CHECK-NEXT: ret i64 [[B]]
;
%a = sub i64 0, %x
%b = tail call i64 @llvm.cttz.i64(i64 %a, i1 false)
ret i64 %b
}
define <2 x i64> @cttz_neg_value_vec(<2 x i64> %x) {
; CHECK-LABEL: @cttz_neg_value_vec(
; CHECK-NEXT: [[B:%.*]] = call range(i64 0, 65) <2 x i64> @llvm.cttz.v2i64(<2 x i64> [[X:%.*]], i1 false)
; CHECK-NEXT: ret <2 x i64> [[B]]
;
%a = sub <2 x i64> zeroinitializer, %x
%b = tail call <2 x i64> @llvm.cttz.v2i64(<2 x i64> %a)
ret <2 x i64> %b
}
; Negative tests
define i32 @cttz_nonneg_value(i32 %x) {
; CHECK-LABEL: @cttz_nonneg_value(
; CHECK-NEXT: [[A:%.*]] = sub i32 1, [[X:%.*]]
; CHECK-NEXT: [[B:%.*]] = call range(i32 0, 33) i32 @llvm.cttz.i32(i32 [[A]], i1 false)
; CHECK-NEXT: ret i32 [[B]]
;
%a = sub i32 1, %x
%b = tail call i32 @llvm.cttz.i32(i32 %a)
ret i32 %b
}
define <2 x i64> @cttz_nonneg_value_vec(<2 x i64> %x) {
; CHECK-LABEL: @cttz_nonneg_value_vec(
; CHECK-NEXT: [[A:%.*]] = sub <2 x i64> <i64 1, i64 0>, [[X:%.*]]
; CHECK-NEXT: [[B:%.*]] = call range(i64 0, 65) <2 x i64> @llvm.cttz.v2i64(<2 x i64> [[A]], i1 false)
; CHECK-NEXT: ret <2 x i64> [[B]]
;
%a = sub <2 x i64> <i64 1, i64 0>, %x
%b = tail call <2 x i64> @llvm.cttz.v2i64(<2 x i64> %a)
ret <2 x i64> %b
}
declare void @use(i32 %a)
declare i32 @llvm.cttz.i32(i32)
declare i64 @llvm.cttz.i64(i64, i1)
declare <2 x i64> @llvm.cttz.v2i64(<2 x i64>)
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