9577086628
Summary: Problem exposed in PowerPC functional testing. We did not consider Anti dependence for nodes in same cycle, so we may end up generating bad machine code. eg: the reduced test won't verify. *** Bad machine code: Using an undefined physical register *** - function: lame_encode_buffer_interleaved - basic block: %bb.4 (0x4bde4e12928) - instruction: %29:gprc = ADDZE %27:gprc, implicit-def dead $carry, implicit $carry - operand 3: implicit $carry Reviewers: bcahoon, kparzysz, hfinkel Subscribers: MaskRay, wuzish, nemanjai, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D64192 llvm-svn: 365859
49 lines
1.5 KiB
LLVM
49 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -verify-machineinstrs\
|
|
; RUN: -mcpu=pwr9 --ppc-enable-pipeliner | FileCheck %s
|
|
|
|
define void @lame_encode_buffer_interleaved() local_unnamed_addr {
|
|
; CHECK-LABEL: lame_encode_buffer_interleaved:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: lhz 3, 0(0)
|
|
; CHECK-NEXT: li 5, 1
|
|
; CHECK-NEXT: sldi 5, 5, 62
|
|
; CHECK-NEXT: lhz 4, 0(3)
|
|
; CHECK-NEXT: mtctr 5
|
|
; CHECK-NEXT: .p2align 5
|
|
; CHECK-NEXT: .LBB0_1: #
|
|
; CHECK-NEXT: extsh 3, 3
|
|
; CHECK-NEXT: extsh 4, 4
|
|
; CHECK-NEXT: srawi 3, 3, 1
|
|
; CHECK-NEXT: addze 3, 3
|
|
; CHECK-NEXT: srawi 4, 4, 1
|
|
; CHECK-NEXT: addze 4, 4
|
|
; CHECK-NEXT: bdnz .LBB0_1
|
|
; CHECK-NEXT: # %bb.2:
|
|
; CHECK-NEXT: sth 3, 0(0)
|
|
; CHECK-NEXT: sth 4, 0(3)
|
|
; CHECK-NEXT: blr
|
|
br label %1
|
|
|
|
1: ; preds = %1, %0
|
|
%2 = phi i64 [ 0, %0 ], [ %13, %1 ]
|
|
%3 = load i16, i16* null, align 2
|
|
%4 = load i16, i16* undef, align 2
|
|
%5 = sext i16 %3 to i32
|
|
%6 = sext i16 %4 to i32
|
|
%7 = add nsw i32 0, %5
|
|
%8 = add nsw i32 0, %6
|
|
%9 = sdiv i32 %7, 2
|
|
%10 = sdiv i32 %8, 2
|
|
%11 = trunc i32 %9 to i16
|
|
%12 = trunc i32 %10 to i16
|
|
store i16 %11, i16* null, align 2
|
|
store i16 %12, i16* undef, align 2
|
|
%13 = add i64 %2, 4
|
|
%14 = icmp eq i64 %13, 0
|
|
br i1 %14, label %15, label %1
|
|
|
|
15: ; preds = %1
|
|
ret void
|
|
}
|