llvm-6502/test/CodeGen/X86/2009-02-26-MachineLICMBug.ll
Jakob Stoklund Olesen 369a4c7759 Eliminate a batch of uses of sub_ss and sub_sd in the X86 target.
These idempotent sub-register indices don't do anything --- They simply
map XMM registers to themselves.  They no longer affect register classes
either since the SubRegClasses field has been removed from Target.td.

This patch replaces XMM->XMM EXTRACT_SUBREG and INSERT_SUBREG patterns
with COPY_TO_REGCLASS patterns which simply become COPY instructions.

The number of IMPLICIT_DEF instructions before register allocation is
reduced, and that is the cause of the test case changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160816 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-26 21:40:42 +00:00

57 lines
2.0 KiB
LLVM

; RUN: llc < %s -march=x86-64 -mattr=+sse3,+sse41 -mcpu=penryn -stats 2>&1 | grep "5 machine-licm"
; RUN: llc < %s -march=x86-64 -mattr=+sse3,+sse41 -mcpu=penryn | FileCheck %s
; rdar://6627786
; rdar://7792037
target triple = "x86_64-apple-darwin10.0"
%struct.Key = type { i64 }
%struct.__Rec = type opaque
%struct.__vv = type { }
define %struct.__vv* @t(%struct.Key* %desc, i64 %p) nounwind ssp {
entry:
br label %bb4
bb4: ; preds = %bb.i, %bb26, %bb4, %entry
; CHECK: %bb4
; CHECK: xorb
; CHECK: callq
; CHECK: movq
; CHECK: xorl
; CHECK: xorb
%0 = call i32 (...)* @xxGetOffsetForCode(i32 undef) nounwind ; <i32> [#uses=0]
%ins = or i64 %p, 2097152 ; <i64> [#uses=1]
%1 = call i32 (...)* @xxCalculateMidType(%struct.Key* %desc, i32 0) nounwind ; <i32> [#uses=1]
%cond = icmp eq i32 %1, 1 ; <i1> [#uses=1]
br i1 %cond, label %bb26, label %bb4
bb26: ; preds = %bb4
%2 = and i64 %ins, 15728640 ; <i64> [#uses=1]
%cond.i = icmp eq i64 %2, 1048576 ; <i1> [#uses=1]
br i1 %cond.i, label %bb.i, label %bb4
bb.i: ; preds = %bb26
%3 = load i32* null, align 4 ; <i32> [#uses=1]
%4 = uitofp i32 %3 to float ; <float> [#uses=1]
%.sum13.i = add i64 0, 4 ; <i64> [#uses=1]
%5 = getelementptr i8* null, i64 %.sum13.i ; <i8*> [#uses=1]
%6 = bitcast i8* %5 to i32* ; <i32*> [#uses=1]
%7 = load i32* %6, align 4 ; <i32> [#uses=1]
%8 = uitofp i32 %7 to float ; <float> [#uses=1]
%.sum.i = add i64 0, 8 ; <i64> [#uses=1]
%9 = getelementptr i8* null, i64 %.sum.i ; <i8*> [#uses=1]
%10 = bitcast i8* %9 to i32* ; <i32*> [#uses=1]
%11 = load i32* %10, align 4 ; <i32> [#uses=1]
%12 = uitofp i32 %11 to float ; <float> [#uses=1]
%13 = insertelement <4 x float> undef, float %4, i32 0 ; <<4 x float>> [#uses=1]
%14 = insertelement <4 x float> %13, float %8, i32 1 ; <<4 x float>> [#uses=1]
%15 = insertelement <4 x float> %14, float %12, i32 2 ; <<4 x float>> [#uses=1]
store <4 x float> %15, <4 x float>* null, align 16
br label %bb4
}
declare i32 @xxGetOffsetForCode(...)
declare i32 @xxCalculateMidType(...)