mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-29 10:32:47 +00:00
25 lines
619 B
LLVM
25 lines
619 B
LLVM
|
; RUN: llc -mcpu=generic -march=x86 < %s | FileCheck %s
|
||
|
|
; PR19858
|
||
|
|
|
||
|
|
declare {i8, i1} @llvm.umul.with.overflow.i8(i8 %a, i8 %b)
|
||
|
|
define i8 @testumulo(i32 %argc) {
|
||
|
|
; CHECK: imulw
|
||
|
|
; CHECK: testb %{{.+}}, %{{.+}}
|
||
|
|
; CHECK: je [[NOOVERFLOWLABEL:.+]]
|
||
|
|
; CHECK: {{.*}}[[NOOVERFLOWLABEL]]:
|
||
|
|
; CHECK-NEXT: movb
|
||
|
|
; CHECK-NEXT: retl
|
||
|
|
top:
|
||
|
|
%RHS = trunc i32 %argc to i8
|
||
|
|
%umul = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 25, i8 %RHS)
|
||
|
|
%ex = extractvalue { i8, i1 } %umul, 1
|
||
|
|
br i1 %ex, label %overflow, label %nooverlow
|
||
|
|
|
||
|
|
overflow:
|
||
|
|
ret i8 %RHS
|
||
|
|
|
||
|
|
nooverlow:
|
||
|
|
%umul.value = extractvalue { i8, i1 } %umul, 0
|
||
|
|
ret i8 %umul.value
|
||
|
|
}
|