diff options
| author | Alkis Evlogimenos <alkis@evlogimenos.com> | 2003-12-20 16:22:59 +0000 |
|---|---|---|
| committer | Alkis Evlogimenos <alkis@evlogimenos.com> | 2003-12-20 16:22:59 +0000 |
| commit | e0bb3e766d977d129da6add3bad6793ca20ab151 (patch) | |
| tree | 4b5f16e3ece7d311d0c937d52bb3b3bfbbf978db /lib/Target/X86/InstSelectSimple.cpp | |
| parent | ef56a197edf546d320b33577b128e803e86f7e0d (diff) | |
Remove floating point killer pass. This is now implemented in the
instruction selector by adding a new pseudo-instruction
FP_REG_KILL. This instruction implicitly defines all x86 fp registers
and is a terminator so that passes which add machine code at the end
of basic blocks (like phi elimination) do not add instructions between
it and the branch or return instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10562 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/InstSelectSimple.cpp')
| -rw-r--r-- | lib/Target/X86/InstSelectSimple.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/X86/InstSelectSimple.cpp b/lib/Target/X86/InstSelectSimple.cpp index 4113076ad2..ca65c446ea 100644 --- a/lib/Target/X86/InstSelectSimple.cpp +++ b/lib/Target/X86/InstSelectSimple.cpp @@ -834,6 +834,7 @@ void ISel::promote32(unsigned targetReg, const ValueRecord &VR) { /// ret float/double : Top of FP stack /// void ISel::visitReturnInst(ReturnInst &I) { + BuildMI(BB, X86::FP_REG_KILL, 0); if (I.getNumOperands() == 0) { BuildMI(BB, X86::RET, 0); // Just emit a 'ret' instruction return; @@ -882,6 +883,7 @@ static inline BasicBlock *getBlockAfter(BasicBlock *BB) { /// void ISel::visitBranchInst(BranchInst &BI) { BasicBlock *NextBB = getBlockAfter(BI.getParent()); // BB after current one + BuildMI(BB, X86::FP_REG_KILL, 0); if (!BI.isConditional()) { // Unconditional branch? if (BI.getSuccessor(0) != NextBB) |