| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -verify-machineinstrs -mtriple=powerpc -mcpu=pwr7 < %s | FileCheck %s |
| |
| ; This piece of IR is expanded from memcmp. |
| define i1 @cmp(i8* %a, i8* %b) { |
| ; CHECK-LABEL: cmp: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: lwz 5, 4(3) |
| ; CHECK-NEXT: lwz 7, 0(3) |
| ; CHECK-NEXT: lwz 6, 4(4) |
| ; CHECK-NEXT: lwz 8, 0(4) |
| ; CHECK-NEXT: xor 9, 7, 8 |
| ; CHECK-NEXT: xor 10, 5, 6 |
| ; CHECK-NEXT: or. 9, 10, 9 |
| ; CHECK-NEXT: bne 0, .LBB0_2 |
| ; CHECK-NEXT: # %bb.1: # %loadbb1 |
| ; CHECK-NEXT: lbz 3, 8(3) |
| ; CHECK-NEXT: lbz 4, 8(4) |
| ; CHECK-NEXT: sub 3, 3, 4 |
| ; CHECK-NEXT: srwi 3, 3, 31 |
| ; CHECK-NEXT: blr |
| ; CHECK-NEXT: .LBB0_2: # %res_block |
| ; CHECK-NEXT: cmplw 7, 8 |
| ; CHECK-NEXT: cmplw 1, 5, 6 |
| ; CHECK-NEXT: li 3, 1 |
| ; CHECK-NEXT: li 4, -1 |
| ; CHECK-NEXT: crandc 20, 0, 2 |
| ; CHECK-NEXT: crand 21, 2, 4 |
| ; CHECK-NEXT: cror 20, 21, 20 |
| ; CHECK-NEXT: isel 3, 4, 3, 20 |
| ; CHECK-NEXT: srwi 3, 3, 31 |
| ; CHECK-NEXT: blr |
| entry: |
| br label %loadbb |
| |
| res_block: |
| %0 = icmp ult i64 %4, %5 |
| %1 = select i1 %0, i32 -1, i32 1 |
| br label %endblock |
| |
| loadbb: |
| %2 = bitcast i8* %a to i64* |
| %3 = bitcast i8* %b to i64* |
| %4 = load i64, i64* %2, align 1 |
| %5 = load i64, i64* %3, align 1 |
| %6 = icmp eq i64 %4, %5 |
| br i1 %6, label %loadbb1, label %res_block |
| |
| loadbb1: |
| %7 = getelementptr i8, i8* %a, i64 8 |
| %8 = getelementptr i8, i8* %b, i64 8 |
| %9 = load i8, i8* %7, align 1 |
| %10 = load i8, i8* %8, align 1 |
| %11 = zext i8 %9 to i32 |
| %12 = zext i8 %10 to i32 |
| %13 = sub i32 %11, %12 |
| br label %endblock |
| |
| endblock: |
| %phi.res = phi i32 [ %13, %loadbb1 ], [ %1, %res_block ] |
| %icmp = icmp slt i32 %phi.res, 0 |
| ret i1 %icmp |
| } |