| ; 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 |
| } |
