1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s 2 ; rdar://7329206 3 4 ; Use sbb x, x to materialize carry bit in a GPR. The value is either 5 ; all 1's or all 0's. 6 7 define zeroext i16 @t1(i16 zeroext %x) nounwind readnone ssp { 8 entry: 9 ; CHECK-LABEL: t1: 10 ; CHECK: seta %al 11 ; CHECK: movzbl %al, %eax 12 ; CHECK: shll $5, %eax 13 %0 = icmp ugt i16 %x, 26 ; <i1> [#uses=1] 14 %iftmp.1.0 = select i1 %0, i16 32, i16 0 ; <i16> [#uses=1] 15 ret i16 %iftmp.1.0 16 } 17 18 define zeroext i16 @t2(i16 zeroext %x) nounwind readnone ssp { 19 entry: 20 ; CHECK-LABEL: t2: 21 ; CHECK: sbbl %eax, %eax 22 ; CHECK: andl $32, %eax 23 %0 = icmp ult i16 %x, 26 ; <i1> [#uses=1] 24 %iftmp.0.0 = select i1 %0, i16 32, i16 0 ; <i16> [#uses=1] 25 ret i16 %iftmp.0.0 26 } 27 28 define i64 @t3(i64 %x) nounwind readnone ssp { 29 entry: 30 ; CHECK-LABEL: t3: 31 ; CHECK: sbbq %rax, %rax 32 ; CHECK: andl $64, %eax 33 %0 = icmp ult i64 %x, 18 ; <i1> [#uses=1] 34 %iftmp.2.0 = select i1 %0, i64 64, i64 0 ; <i64> [#uses=1] 35 ret i64 %iftmp.2.0 36 } 37 38 @v4 = common global i32 0, align 4 39 40 define i32 @t4(i32 %a) { 41 entry: 42 ; CHECK-LABEL: t4: 43 ; CHECK: movq _v4@GOTPCREL(%rip), %rax 44 ; CHECK: cmpl $1, (%rax) 45 ; CHECK: sbbl %eax, %eax 46 ; CHECK: andl $32768, %eax 47 ; CHECK: leal 65536(%rax,%rax), %eax 48 %0 = load i32, i32* @v4, align 4 49 %not.tobool = icmp eq i32 %0, 0 50 %conv.i = sext i1 %not.tobool to i16 51 %call.lobit = lshr i16 %conv.i, 15 52 %add.i.1 = add nuw nsw i16 %call.lobit, 1 53 %conv4.2 = zext i16 %add.i.1 to i32 54 %add = shl nuw nsw i32 %conv4.2, 16 55 ret i32 %add 56 } 57
