6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-24 23:28:41 +00:00
Code Issues Projects Releases Wiki Activity

Truncate from i64 to i32 is "free" on x86-32, because it involves

Browse Source 
just discarding one of the registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97100 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-02-25 03:04:36 +00:00
parent 0d0840108f
commit 377fbc073c
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
lib/Target/X86/X86ISelLowering.cpp
View File

@@ -7780,7 +7780,7 @@ bool X86TargetLowering::isTruncateFree(const Type *Ty1, const Type *Ty2) const {
unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
if (NumBits1 <= NumBits2)
return false;
return Subtarget->is64Bit() || NumBits1 < 64;
return true;
}
bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
@@ -7790,7 +7790,7 @@ bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
unsigned NumBits2 = VT2.getSizeInBits();
if (NumBits1 <= NumBits2)
return false;
return Subtarget->is64Bit() || NumBits1 < 64;
return true;
}
bool X86TargetLowering::isZExtFree(const Type *Ty1, const Type *Ty2) const {