| ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s |
| |
| ; Test that we recognize that an 'and' instruction that feeds a comparison |
| ; to zero can be simplifed by using the record form when one of its operands |
| ; is known to be zero extended. |
| |
| @k = local_unnamed_addr global i32 0, align 4 |
| |
| ; Function Attrs: norecurse nounwind |
| define signext i32 @cmplwi(ptr nocapture readonly %p, ptr nocapture readonly %q, i32 signext %j, i32 signext %r10) { |
| entry: |
| %0 = load i32, ptr %q, align 4 |
| %shl = shl i32 %0, %j |
| %1 = load i32, ptr %p, align 4 |
| %and = and i32 %shl, %r10 |
| %and1 = and i32 %and, %1 |
| %tobool = icmp eq i32 %and1, 0 |
| br i1 %tobool, label %cleanup, label %if.then |
| |
| if.then: |
| store i32 %j, ptr @k, align 4 |
| br label %cleanup |
| |
| cleanup: |
| %retval.0 = phi i32 [ 0, %if.then ], [ 1, %entry ] |
| ret i32 %retval.0 |
| } |
| |
| ; CHECK-LABEL: cmplwi: |
| ; CHECK: lwz [[T1:[0-9]+]], 0(3) |
| ; CHECK: and. {{[0-9]+}}, {{[0-9]+}}, [[T1]] |
| ; CHECK-NOT: cmplwi |
| ; CHECK-NEXT: beq 0, |
