1 ; RUN: llc -mcpu=generic -march=x86 < %s | FileCheck %s 2 ; PR19858 3 4 declare {i8, i1} @llvm.umul.with.overflow.i8(i8 %a, i8 %b) 5 define i8 @testumulo(i32 %argc) { 6 ; CHECK: imulw 7 ; CHECK: testb %{{.+}}, %{{.+}} 8 ; CHECK: je [[NOOVERFLOWLABEL:.+]] 9 ; CHECK: {{.*}}[[NOOVERFLOWLABEL]]: 10 ; CHECK-NEXT: movb 11 ; CHECK-NEXT: retl 12 top: 13 %RHS = trunc i32 %argc to i8 14 %umul = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 25, i8 %RHS) 15 %ex = extractvalue { i8, i1 } %umul, 1 16 br i1 %ex, label %overflow, label %nooverlow 17 18 overflow: 19 ret i8 %RHS 20 21 nooverlow: 22 %umul.value = extractvalue { i8, i1 } %umul, 0 23 ret i8 %umul.value 24 } 25
