1 ; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s 2 ; RUN: llc < %s -mtriple=x86_64-win32 | FileCheck %s 3 4 ; Reuse the flags value from the add instructions instead of emitting separate 5 ; testl instructions. 6 7 ; Use the flags on the add. 8 9 ; CHECK: test1: 10 ; CHECK: addl 11 ; CHECK-NOT: test 12 ; CHECK: cmovnsl 13 ; CHECK: ret 14 15 define i32 @test1(i32* %x, i32 %y, i32 %a, i32 %b) nounwind { 16 %tmp2 = load i32* %x, align 4 ; <i32> [#uses=1] 17 %tmp4 = add i32 %tmp2, %y ; <i32> [#uses=1] 18 %tmp5 = icmp slt i32 %tmp4, 0 ; <i1> [#uses=1] 19 %tmp.0 = select i1 %tmp5, i32 %a, i32 %b ; <i32> [#uses=1] 20 ret i32 %tmp.0 21 } 22 23 declare void @foo(i32) 24 25 ; Don't use the flags result of the and here, since the and has no 26 ; other use. A simple test is better. 27 28 ; CHECK: test2: 29 ; CHECK: testb $16, {{%dil|%cl}} 30 31 define void @test2(i32 %x) nounwind { 32 %y = and i32 %x, 16 33 %t = icmp eq i32 %y, 0 34 br i1 %t, label %true, label %false 35 true: 36 call void @foo(i32 %x) 37 ret void 38 false: 39 ret void 40 } 41 42 ; Do use the flags result of the and here, since the and has another use. 43 44 ; CHECK: test3: 45 ; CHECK: andl $16, %e 46 ; CHECK-NEXT: jne 47 48 define void @test3(i32 %x) nounwind { 49 %y = and i32 %x, 16 50 %t = icmp eq i32 %y, 0 51 br i1 %t, label %true, label %false 52 true: 53 call void @foo(i32 %y) 54 ret void 55 false: 56 ret void 57 } 58
