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