1*9880d681SAndroid Build Coastguard Worker; RUN: llc -O3 < %s -aarch64-atomic-cfg-tidy=0 -aarch64-gep-opt=false -verify-machineinstrs | FileCheck %s 2*9880d681SAndroid Build Coastguard Workertarget triple = "arm64-apple-ios" 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; rdar://12462006 5*9880d681SAndroid Build Coastguard Worker; CSE between "icmp reg reg" and "sub reg reg". 6*9880d681SAndroid Build Coastguard Worker; Both can be in the same basic block or in different basic blocks. 7*9880d681SAndroid Build Coastguard Workerdefine i8* @t1(i8* %base, i32* nocapture %offset, i32 %size) nounwind { 8*9880d681SAndroid Build Coastguard Workerentry: 9*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: t1: 10*9880d681SAndroid Build Coastguard Worker; CHECK: subs 11*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: cmp 12*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub 13*9880d681SAndroid Build Coastguard Worker; CHECK: b.ge 14*9880d681SAndroid Build Coastguard Worker; CHECK: sub 15*9880d681SAndroid Build Coastguard Worker; CHECK: sub 16*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub 17*9880d681SAndroid Build Coastguard Worker; CHECK: ret 18*9880d681SAndroid Build Coastguard Worker %0 = load i32, i32* %offset, align 4 19*9880d681SAndroid Build Coastguard Worker %cmp = icmp slt i32 %0, %size 20*9880d681SAndroid Build Coastguard Worker %s = sub nsw i32 %0, %size 21*9880d681SAndroid Build Coastguard Worker br i1 %cmp, label %return, label %if.end 22*9880d681SAndroid Build Coastguard Worker 23*9880d681SAndroid Build Coastguard Workerif.end: 24*9880d681SAndroid Build Coastguard Worker %sub = sub nsw i32 %0, %size 25*9880d681SAndroid Build Coastguard Worker %s2 = sub nsw i32 %s, %size 26*9880d681SAndroid Build Coastguard Worker %s3 = sub nsw i32 %sub, %s2 27*9880d681SAndroid Build Coastguard Worker store i32 %s3, i32* %offset, align 4 28*9880d681SAndroid Build Coastguard Worker %add.ptr = getelementptr inbounds i8, i8* %base, i32 %sub 29*9880d681SAndroid Build Coastguard Worker br label %return 30*9880d681SAndroid Build Coastguard Worker 31*9880d681SAndroid Build Coastguard Workerreturn: 32*9880d681SAndroid Build Coastguard Worker %retval.0 = phi i8* [ %add.ptr, %if.end ], [ null, %entry ] 33*9880d681SAndroid Build Coastguard Worker ret i8* %retval.0 34*9880d681SAndroid Build Coastguard Worker} 35*9880d681SAndroid Build Coastguard Worker 36*9880d681SAndroid Build Coastguard Worker; CSE between "icmp reg imm" and "sub reg imm". 37*9880d681SAndroid Build Coastguard Workerdefine i8* @t2(i8* %base, i32* nocapture %offset) nounwind { 38*9880d681SAndroid Build Coastguard Workerentry: 39*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: t2: 40*9880d681SAndroid Build Coastguard Worker; CHECK: subs 41*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: cmp 42*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub 43*9880d681SAndroid Build Coastguard Worker; CHECK: b.lt 44*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sub 45*9880d681SAndroid Build Coastguard Worker; CHECK: ret 46*9880d681SAndroid Build Coastguard Worker %0 = load i32, i32* %offset, align 4 47*9880d681SAndroid Build Coastguard Worker %cmp = icmp slt i32 %0, 1 48*9880d681SAndroid Build Coastguard Worker br i1 %cmp, label %return, label %if.end 49*9880d681SAndroid Build Coastguard Worker 50*9880d681SAndroid Build Coastguard Workerif.end: 51*9880d681SAndroid Build Coastguard Worker %sub = sub nsw i32 %0, 1 52*9880d681SAndroid Build Coastguard Worker store i32 %sub, i32* %offset, align 4 53*9880d681SAndroid Build Coastguard Worker %add.ptr = getelementptr inbounds i8, i8* %base, i32 %sub 54*9880d681SAndroid Build Coastguard Worker br label %return 55*9880d681SAndroid Build Coastguard Worker 56*9880d681SAndroid Build Coastguard Workerreturn: 57*9880d681SAndroid Build Coastguard Worker %retval.0 = phi i8* [ %add.ptr, %if.end ], [ null, %entry ] 58*9880d681SAndroid Build Coastguard Worker ret i8* %retval.0 59*9880d681SAndroid Build Coastguard Worker} 60