1; RUN: llc < %s -march=arm | FileCheck %s 2 3define i64 @f1(i64 %a, i64 %b) { 4; CHECK: f1: 5; CHECK: subs r 6; CHECK: sbc r 7entry: 8 %tmp = sub i64 %a, %b 9 ret i64 %tmp 10} 11 12define i64 @f2(i64 %a, i64 %b) { 13; CHECK: f2: 14; CHECK: adc r 15; CHECK: subs r 16; CHECK: sbc r 17entry: 18 %tmp1 = shl i64 %a, 1 19 %tmp2 = sub i64 %tmp1, %b 20 ret i64 %tmp2 21} 22 23; add with live carry 24define i64 @f3(i32 %al, i32 %bl) { 25; CHECK: f3: 26; CHECK: adds r 27; CHECK: adc r 28entry: 29 ; unsigned wide add 30 %aw = zext i32 %al to i64 31 %bw = zext i32 %bl to i64 32 %cw = add i64 %aw, %bw 33 ; ch == carry bit 34 %ch = lshr i64 %cw, 32 35 %dw = add i64 %ch, %bw 36 ret i64 %dw 37} 38 39; rdar://10073745 40define i64 @f4(i64 %x) nounwind readnone { 41entry: 42; CHECK: f4: 43; CHECK: rsbs r 44; CHECK: rsc r 45 %0 = sub nsw i64 0, %x 46 ret i64 %0 47} 48