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llvm-project/llvm/test/CodeGen/X86/memset-2.ll

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Try to unbreak the arm buildbot. llvm-svn: 122999
2011-01-07 19:35:21 +08:00
; RUN: llc -mtriple=i386-apple-darwin -mcpu=yonah < %s | FileCheck %s
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
2008-08-22 05:00:15 +08:00
declare void @llvm.memset.i32(i8*, i8, i32, i32) nounwind
- Avoid using floating point stores to implement memset unless the value is zero. - Do not try to infer GV alignment unless its type is sized. It's not possible to infer alignment if it has opaque type. llvm-svn: 100118
2010-04-02 02:19:11 +08:00
define fastcc void @t1() nounwind {
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
2008-08-22 05:00:15 +08:00
entry:
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: t1:
Hide the stub created for MO_ExternalSymbol too. given declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) declare void @foo() define void @bar() { call void @foo() call void @llvm.memset.p0i8.i32(i8* null, i8 0, i32 188, i32 1, i1 false) ret void } We used to produce L_foo$stub: .indirect_symbol _foo .ascii "\364\364\364\364\364" _memset$stub: .indirect_symbol _memset .ascii "\364\364\364\364\364" We not produce a private stub for memset too. Stubs are not needed with recent linkers, but we still produce them for darwin8. Thanks to David Fang for confirming that gcc used to do this too. llvm-svn: 196468
2013-12-05 13:19:12 +08:00
; CHECK: calll L_memset$stub
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
call void @llvm.memset.p0i8.i32(i8* null, i8 0, i32 188, i32 1, i1 false)
Fix sdisel memcpy, memset, memmove lowering: 1. Makes it possible to lower with floating point loads and stores. 2. Avoid unaligned loads / stores unless it's fast. 3. Fix some memcpy lowering logic bug related to when to optimize a load from constant string into a constant. 4. Adjust x86 memcpy lowering threshold to make it more sane. 5. Fix x86 target hook so it uses vector and floating point memory ops more effectively. rdar://7774704 llvm-svn: 100090
2010-04-01 14:04:33 +08:00
unreachable
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
2008-08-22 05:00:15 +08:00
}
- Avoid using floating point stores to implement memset unless the value is zero. - Do not try to infer GV alignment unless its type is sized. It's not possible to infer alignment if it has opaque type. llvm-svn: 100118
2010-04-02 02:19:11 +08:00
define fastcc void @t2(i8 signext %c) nounwind {
entry:
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: t2:
Hide the stub created for MO_ExternalSymbol too. given declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) declare void @foo() define void @bar() { call void @foo() call void @llvm.memset.p0i8.i32(i8* null, i8 0, i32 188, i32 1, i1 false) ret void } We used to produce L_foo$stub: .indirect_symbol _foo .ascii "\364\364\364\364\364" _memset$stub: .indirect_symbol _memset .ascii "\364\364\364\364\364" We not produce a private stub for memset too. Stubs are not needed with recent linkers, but we still produce them for darwin8. Thanks to David Fang for confirming that gcc used to do this too. llvm-svn: 196468
2013-12-05 13:19:12 +08:00
; CHECK: calll L_memset$stub
rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is for pre-2.9 bitcode files. We keep x86 unaligned loads, movnt, crc32, and the target indep prefetch change. As usual, updating the testsuite is a PITA. llvm-svn: 133337
2011-06-18 14:05:24 +08:00
call void @llvm.memset.p0i8.i32(i8* undef, i8 %c, i32 76, i32 1, i1 false)
- Avoid using floating point stores to implement memset unless the value is zero. - Do not try to infer GV alignment unless its type is sized. It's not possible to infer alignment if it has opaque type. llvm-svn: 100118
2010-04-02 02:19:11 +08:00
unreachable
}
Lower the i8 extension in memset to a multiply instead of a potentially long series of shifts and ors. We could implement a DAGCombine to turn x * 0x0101 back into logic operations on targets that doesn't support the multiply or it is slow (p4) if someone cares enough. Example code: void test(char *s, int a) { __builtin_memset(s, a, 4); } before: _test: ## @test movzbl 8(%esp), %eax movl %eax, %ecx shll $8, %ecx orl %eax, %ecx movl %ecx, %eax shll $16, %eax orl %ecx, %eax movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret after: _test: ## @test movzbl 8(%esp), %eax imull $16843009, %eax, %eax ## imm = 0x1010101 movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret llvm-svn: 122707
2011-01-03 03:44:58 +08:00
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
define void @t3(i8* nocapture %s, i8 %a) nounwind {
entry:
tail call void @llvm.memset.p0i8.i32(i8* %s, i8 %a, i32 8, i32 1, i1 false)
ret void
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: t3:
Lower the i8 extension in memset to a multiply instead of a potentially long series of shifts and ors. We could implement a DAGCombine to turn x * 0x0101 back into logic operations on targets that doesn't support the multiply or it is slow (p4) if someone cares enough. Example code: void test(char *s, int a) { __builtin_memset(s, a, 4); } before: _test: ## @test movzbl 8(%esp), %eax movl %eax, %ecx shll $8, %ecx orl %eax, %ecx movl %ecx, %eax shll $16, %eax orl %ecx, %eax movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret after: _test: ## @test movzbl 8(%esp), %eax imull $16843009, %eax, %eax ## imm = 0x1010101 movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret llvm-svn: 122707
2011-01-03 03:44:58 +08:00
; CHECK: imull $16843009
}
Try to reuse the value when lowering memset. This allows us to compile: void test(char *s, int a) { __builtin_memset(s, a, 15); } into 1 mul + 3 stores instead of 3 muls + 3 stores. llvm-svn: 122710
2011-01-03 03:57:05 +08:00
define void @t4(i8* nocapture %s, i8 %a) nounwind {
entry:
tail call void @llvm.memset.p0i8.i32(i8* %s, i8 %a, i32 15, i32 1, i1 false)
ret void
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP done sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: t4:
Try to reuse the value when lowering memset. This allows us to compile: void test(char *s, int a) { __builtin_memset(s, a, 15); } into 1 mul + 3 stores instead of 3 muls + 3 stores. llvm-svn: 122710
2011-01-03 03:57:05 +08:00
; CHECK: imull $16843009
; CHECK-NOT: imul
; CHECK: ret
}