File: umul-with-overflow.ll

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llvm-toolchain-4.0 1%3A4.0.1-10~deb9u2
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; RUN: llc < %s -mtriple=i686-unknown-linux-gnu | FileCheck %s

declare {i32, i1} @llvm.umul.with.overflow.i32(i32 %a, i32 %b)
define zeroext i1 @a(i32 %x)  nounwind {
  %res = call {i32, i1} @llvm.umul.with.overflow.i32(i32 %x, i32 3)
  %obil = extractvalue {i32, i1} %res, 1
  ret i1 %obil
  
; CHECK-LABEL: a:
; CHECK: mull
; CHECK: seto %al
; CHECK: ret
}

define i32 @test2(i32 %a, i32 %b) nounwind readnone {
entry:
	%tmp0 = add i32 %b, %a
	%tmp1 = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %tmp0, i32 2)
	%tmp2 = extractvalue { i32, i1 } %tmp1, 0
	ret i32 %tmp2
; CHECK-LABEL: test2:
; CHECK: addl
; CHECK-NEXT: addl
; CHECK-NEXT: ret
}

define i32 @test3(i32 %a, i32 %b) nounwind readnone {
entry:
	%tmp0 = add i32 %b, %a
	%tmp1 = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %tmp0, i32 4)
	%tmp2 = extractvalue { i32, i1 } %tmp1, 0
	ret i32 %tmp2
; CHECK-LABEL: test3:
; CHECK: addl
; CHECK: mull
; CHECK-NEXT: ret
}