Displaying 5 results from an estimated 5 matches for "emitlv".
2009 Jan 09
0
[LLVMdev] RFC: Store alignment should be LValue alignment, not source alignment
Hi Evan,
> LValue LV = EmitLV(lhs);
> bool isVolatile = TREE_THIS_VOLATILE(lhs);
> unsigned Alignment = expr_align(exp) / 8
>
> It's using the alignment of the expression, rather than the memory
> object of LValue.
can't you just use expr_align(lhs) instead?
> The patch saves the alignment o...
2009 Jan 09
2
[LLVMdev] RFC: Store alignment should be LValue alignment, not source alignment
...64*>
[#uses=1]
%6 = load i64* %key_token2_addr, align 8 ;
<i64> [#uses=1]
store i64 %6, i64* %5, align 8
...
The store alignment 8 is wrong. The address iospec has 4-byte
alignment. The problem is llvm-gcc TreeToLLVM::EmitMODIFY_EXPR:
LValue LV = EmitLV(lhs);
bool isVolatile = TREE_THIS_VOLATILE(lhs);
unsigned Alignment = expr_align(exp) / 8
It's using the alignment of the expression, rather than the memory
object of LValue.
The patch saves the alignment of the memory object in LValue returned
by EmitLV(). Please review it carefull...
2007 Nov 07
3
[LLVMdev] RFC: llvm-convert.cpp Patch
...unsigned SrcAlign) {
// If this is an SSA value, don't emit a load, just use the result.
if (isGCC_SSA_Temporary(exp)) {
assert(DECL_LLVM_SET_P(exp) && "Definition not found before
use!");
@@ -2540,7 +2541,7 @@
LValue LV = EmitLV(exp);
bool isVolatile = TREE_THIS_VOLATILE(exp);
const Type *Ty = ConvertType(TREE_TYPE(exp));
- unsigned Alignment = expr_align(exp) / 8;
+ unsigned DstAlign = expr_align(exp) / 8;
if (!LV.isBitfield()) {
if (!DestLoc) {
@@ -2548,17 +2549,17 @@
Value *Ptr = CastToType(...
2007 Nov 07
0
[LLVMdev] RFC: llvm-convert.cpp Patch
On Nov 6, 2007, at 5:45 PM, Bill Wendling wrote:
> Hi all,
>
> This patch is to fix a problem on PPC64 where an unaligned memcpy is
> generated. The testcase is this:
>
> $ cat testcase.c
> void Qux() {
> char Bar[11] = {0};
> }
>
> What happens is that we produce LLVM code like this:
>
> call void @llvm.memcpy.i64( i8* %event_list2, i8* getelementptr ([11
2007 Nov 07
7
[LLVMdev] RFC: llvm-convert.cpp Patch
Hi all,
This patch is to fix a problem on PPC64 where an unaligned memcpy is
generated. The testcase is this:
$ cat testcase.c
void Qux() {
char Bar[11] = {0};
}
What happens is that we produce LLVM code like this:
call void @llvm.memcpy.i64( i8* %event_list2, i8* getelementptr ([11
x i8]* @C.103.30698, i32 0, i32 0), i64 11, i32 8 )
Notice that it has an 8-byte alignment. However, the Bar