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TheRock/compiler/amd-llvm/llvm/test/Transforms/InstCombine/sub-after-sle-is-non-negative.ll
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
declare void @subroutine(i16)
define void @test_as_arg(i8 %a, i8 %b) {
; CHECK-LABEL: define void @test_as_arg(
; CHECK-SAME: i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[A]], [[B]]
; CHECK-NEXT: br i1 [[CMP]], label %[[COND_END:.*]], label %[[COND_FALSE:.*]]
; CHECK: [[COND_FALSE]]:
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 [[B]], [[A]]
; CHECK-NEXT: [[CONV:%.*]] = zext nneg i8 [[SUB]] to i16
; CHECK-NEXT: call void @subroutine(i16 [[CONV]])
; CHECK-NEXT: br label %[[COND_END]]
; CHECK: [[COND_END]]:
; CHECK-NEXT: ret void
;
%cmp = icmp sgt i8 %a, %b
br i1 %cmp, label %cond.end, label %cond.false
cond.false:
%sub = sub nsw i8 %b, %a
%conv = sext i8 %sub to i16
call void @subroutine(i16 %conv)
br label %cond.end
cond.end:
ret void
}
define i16 @test_as_retval(i8 %a, i8 %b) {
; CHECK-LABEL: define i16 @test_as_retval(
; CHECK-SAME: i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[A]], [[B]]
; CHECK-NEXT: br i1 [[CMP]], label %[[COND_TRUE:.*]], label %[[COND_FALSE:.*]]
; CHECK: [[COND_TRUE]]:
; CHECK-NEXT: ret i16 0
; CHECK: [[COND_FALSE]]:
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 [[B]], [[A]]
; CHECK-NEXT: [[CONV:%.*]] = zext nneg i8 [[SUB]] to i16
; CHECK-NEXT: ret i16 [[CONV]]
;
%cmp = icmp sgt i8 %a, %b
br i1 %cmp, label %cond.true, label %cond.false
cond.true:
ret i16 0
cond.false:
%sub = sub nsw i8 %b, %a
%conv = sext i8 %sub to i16
ret i16 %conv
}
define void @test_as_arg_wrong_icmp(i8 %a, i8 %b) {
; CHECK-LABEL: define void @test_as_arg_wrong_icmp(
; CHECK-SAME: i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[A]], [[B]]
; CHECK-NEXT: br i1 [[CMP]], label %[[COND_END:.*]], label %[[COND_FALSE:.*]]
; CHECK: [[COND_FALSE]]:
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 [[B]], [[A]]
; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[SUB]] to i16
; CHECK-NEXT: call void @subroutine(i16 [[CONV]])
; CHECK-NEXT: br label %[[COND_END]]
; CHECK: [[COND_END]]:
; CHECK-NEXT: ret void
;
%cmp = icmp slt i8 %a, %b
br i1 %cmp, label %cond.end, label %cond.false
cond.false:
%sub = sub nsw i8 %b, %a
%conv = sext i8 %sub to i16
call void @subroutine(i16 %conv)
br label %cond.end
cond.end:
ret void
}
define void @test_as_arg_missing_nsw(i8 %a, i8 %b) {
; CHECK-LABEL: define void @test_as_arg_missing_nsw(
; CHECK-SAME: i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[A]], [[B]]
; CHECK-NEXT: br i1 [[CMP]], label %[[COND_END:.*]], label %[[COND_FALSE:.*]]
; CHECK: [[COND_FALSE]]:
; CHECK-NEXT: [[SUB:%.*]] = sub i8 [[B]], [[A]]
; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[SUB]] to i16
; CHECK-NEXT: call void @subroutine(i16 [[CONV]])
; CHECK-NEXT: br label %[[COND_END]]
; CHECK: [[COND_END]]:
; CHECK-NEXT: ret void
;
%cmp = icmp sgt i8 %a, %b
br i1 %cmp, label %cond.end, label %cond.false
cond.false:
%sub = sub i8 %b, %a
%conv = sext i8 %sub to i16
call void @subroutine(i16 %conv)
br label %cond.end
cond.end:
ret void
}
define i16 @test_as_retval_wrong_icmp(i8 %a, i8 %b) {
; CHECK-LABEL: define i16 @test_as_retval_wrong_icmp(
; CHECK-SAME: i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[A]], [[B]]
; CHECK-NEXT: br i1 [[CMP]], label %[[COND_TRUE:.*]], label %[[COND_FALSE:.*]]
; CHECK: [[COND_TRUE]]:
; CHECK-NEXT: ret i16 0
; CHECK: [[COND_FALSE]]:
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i8 [[B]], [[A]]
; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[SUB]] to i16
; CHECK-NEXT: ret i16 [[CONV]]
;
%cmp = icmp slt i8 %a, %b
br i1 %cmp, label %cond.true, label %cond.false
cond.true:
ret i16 0
cond.false:
%sub = sub nsw i8 %b, %a
%conv = sext i8 %sub to i16
ret i16 %conv
}
define i16 @test_as_retval_missing_nsw(i8 %a, i8 %b) {
; CHECK-LABEL: define i16 @test_as_retval_missing_nsw(
; CHECK-SAME: i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i8 [[A]], [[B]]
; CHECK-NEXT: br i1 [[CMP]], label %[[COND_TRUE:.*]], label %[[COND_FALSE:.*]]
; CHECK: [[COND_TRUE]]:
; CHECK-NEXT: ret i16 0
; CHECK: [[COND_FALSE]]:
; CHECK-NEXT: [[SUB:%.*]] = sub i8 [[B]], [[A]]
; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[SUB]] to i16
; CHECK-NEXT: ret i16 [[CONV]]
;
%cmp = icmp sgt i8 %a, %b
br i1 %cmp, label %cond.true, label %cond.false
cond.true:
ret i16 0
cond.false:
%sub = sub i8 %b, %a
%conv = sext i8 %sub to i16
ret i16 %conv
}
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