llvm-mirror/test/CodeGen/X86/memset-2.ll
Evan Cheng ef2509b3ba Fix a number of byval / memcpy / memset related codegen issues.
1. x86-64 byval alignment should be max of 8 and alignment of type. Previously the code was not doing what the commit message was saying.
2. Do not use byte repeat move and store operations. These are slow.

llvm-svn: 55139
2008-08-21 21:00:15 +00:00

46 lines
1.5 KiB
LLVM

; RUN: llvm-as < %s | llc -march=x86 | not grep rep
; RUN: llvm-as < %s | llc -march=x86 | grep memset
declare void @llvm.memset.i32(i8*, i8, i32, i32) nounwind
define fastcc i32 @cli_scanzip(i32 %desc) nounwind {
entry:
br label %bb8.i.i.i.i
bb8.i.i.i.i: ; preds = %bb8.i.i.i.i, %entry
icmp eq i32 0, 0 ; <i1>:0 [#uses=1]
br i1 %0, label %bb61.i.i.i, label %bb8.i.i.i.i
bb32.i.i.i: ; preds = %bb61.i.i.i
ptrtoint i8* %tail.0.i.i.i to i32 ; <i32>:1 [#uses=1]
sub i32 0, %1 ; <i32>:2 [#uses=1]
icmp sgt i32 %2, 19 ; <i1>:3 [#uses=1]
br i1 %3, label %bb34.i.i.i, label %bb61.i.i.i
bb34.i.i.i: ; preds = %bb32.i.i.i
load i32* null, align 4 ; <i32>:4 [#uses=1]
icmp eq i32 %4, 101010256 ; <i1>:5 [#uses=1]
br i1 %5, label %bb8.i11.i.i.i, label %bb61.i.i.i
bb8.i11.i.i.i: ; preds = %bb8.i11.i.i.i, %bb34.i.i.i
icmp eq i32 0, 0 ; <i1>:6 [#uses=1]
br i1 %6, label %cli_dbgmsg.exit49.i, label %bb8.i11.i.i.i
cli_dbgmsg.exit49.i: ; preds = %bb8.i11.i.i.i
icmp eq [32768 x i8]* null, null ; <i1>:7 [#uses=1]
br i1 %7, label %bb1.i28.i, label %bb8.i.i
bb61.i.i.i: ; preds = %bb61.i.i.i, %bb34.i.i.i, %bb32.i.i.i, %bb8.i.i.i.i
%tail.0.i.i.i = getelementptr [1024 x i8]* null, i32 0, i32 0 ; <i8*> [#uses=2]
load i8* %tail.0.i.i.i, align 1 ; <i8>:8 [#uses=1]
icmp eq i8 %8, 80 ; <i1>:9 [#uses=1]
br i1 %9, label %bb32.i.i.i, label %bb61.i.i.i
bb1.i28.i: ; preds = %cli_dbgmsg.exit49.i
call void @llvm.memset.i32( i8* null, i8 0, i32 88, i32 1 ) nounwind
unreachable
bb8.i.i: ; preds = %bb8.i.i, %cli_dbgmsg.exit49.i
br label %bb8.i.i
}