llvm-6502/test/CodeGen/X86/2008-08-05-SpillerBug.ll
Eric Christopher 7c2cdb1c05 Turn on list-ilp scheduling by default on x86 and x86-64, fix up
testcases accordingly. Some are currently xfailed and will be filed
as bugs to be fixed or understood.

Performance results:

roughly neutral on SPEC
some micro benchmarks in the llvm suite are up between 100 and 150%, only
a pair of regressions that are due to be investigated

john-the-ripper saw:
10% improvement in traditional DES
8% improvement in BSDI DES
59% improvement in FreeBSD MD5
67% improvement in OpenBSD Blowfish
14% improvement in LM DES

Small compile time impact.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127208 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-08 02:42:25 +00:00

45 lines
1.7 KiB
LLVM

; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=yonah -pre-RA-sched=list-burr -disable-fp-elim -stats |& grep asm-printer | grep 55
; PR2568
@g_3 = external global i16 ; <i16*> [#uses=1]
@g_5 = external global i32 ; <i32*> [#uses=3]
declare i32 @func_15(i16 signext , i16 signext , i32) nounwind
define void @func_9_entry_2E_ce(i8 %p_11) nounwind {
newFuncRoot:
br label %entry.ce
entry.ce.ret.exitStub: ; preds = %entry.ce
ret void
entry.ce: ; preds = %newFuncRoot
load i16* @g_3, align 2 ; <i16>:0 [#uses=1]
icmp sgt i16 %0, 0 ; <i1>:1 [#uses=1]
zext i1 %1 to i32 ; <i32>:2 [#uses=1]
load i32* @g_5, align 4 ; <i32>:3 [#uses=4]
icmp ugt i32 %2, %3 ; <i1>:4 [#uses=1]
zext i1 %4 to i32 ; <i32>:5 [#uses=1]
icmp eq i32 %3, 0 ; <i1>:6 [#uses=1]
%.0 = select i1 %6, i32 1, i32 %3 ; <i32> [#uses=1]
urem i32 1, %.0 ; <i32>:7 [#uses=2]
sext i8 %p_11 to i16 ; <i16>:8 [#uses=1]
trunc i32 %3 to i16 ; <i16>:9 [#uses=1]
tail call i32 @func_15( i16 signext %8, i16 signext %9, i32 1 ) nounwind ; <i32>:10 [#uses=0]
load i32* @g_5, align 4 ; <i32>:11 [#uses=1]
trunc i32 %11 to i16 ; <i16>:12 [#uses=1]
tail call i32 @func_15( i16 signext %12, i16 signext 1, i32 %7 ) nounwind ; <i32>:13 [#uses=0]
sext i8 %p_11 to i32 ; <i32>:14 [#uses=1]
%p_11.lobit = lshr i8 %p_11, 7 ; <i8> [#uses=1]
%tmp = zext i8 %p_11.lobit to i32 ; <i32> [#uses=1]
%tmp.not = xor i32 %tmp, 1 ; <i32> [#uses=1]
%.015 = ashr i32 %14, %tmp.not ; <i32> [#uses=2]
icmp eq i32 %.015, 0 ; <i1>:15 [#uses=1]
%.016 = select i1 %15, i32 1, i32 %.015 ; <i32> [#uses=1]
udiv i32 %7, %.016 ; <i32>:16 [#uses=1]
icmp ult i32 %5, %16 ; <i1>:17 [#uses=1]
zext i1 %17 to i32 ; <i32>:18 [#uses=1]
store i32 %18, i32* @g_5, align 4
br label %entry.ce.ret.exitStub
}