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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-06-27 04:08:33 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-06-27 04:08:33 +0000 |
commit | f792fa90f1125553008659c743cba85b9b5d2e5e (patch) | |
tree | 55af9377e3bfb8833d0c5f862a6a19f7cd5fb39f /lib/CodeGen/MachineInstr.cpp | |
parent | 7a2ecd3f99ae4dede7e8c1984c2a08984be69363 (diff) | |
download | external_llvm-f792fa90f1125553008659c743cba85b9b5d2e5e.zip external_llvm-f792fa90f1125553008659c743cba85b9b5d2e5e.tar.gz external_llvm-f792fa90f1125553008659c743cba85b9b5d2e5e.tar.bz2 |
Distinguish early clobber output operands from clobbered registers.
Both become <earlyclobber> defs on the INLINEASM MachineInstr, but we
now use two different asm operand kinds.
The new Kind_Clobber is treated identically to the old
Kind_RegDefEarlyClobber for now, but x87 floating point stack inline
assembly does care about the difference.
This will pop a register off the stack:
asm("fstp %st" : : "t"(x) : "st");
While this will pop the input and push an output:
asm("fst %st" : "=&t"(r) : "t"(x));
We need to know if ST0 was a clobber or an output operand, and we can't
depend on <dead> flags for that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133902 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineInstr.cpp')
-rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index d4d8202..938b83d 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -1443,9 +1443,10 @@ void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const { switch (InlineAsm::getKind(Flag)) { case InlineAsm::Kind_RegUse: OS << ":[reguse]"; break; case InlineAsm::Kind_RegDef: OS << ":[regdef]"; break; + case InlineAsm::Kind_RegDefEarlyClobber: OS << ":[regdef-ec]"; break; + case InlineAsm::Kind_Clobber: OS << ":[clobber]"; break; case InlineAsm::Kind_Imm: OS << ":[imm]"; break; case InlineAsm::Kind_Mem: OS << ":[mem]"; break; - case InlineAsm::Kind_RegDefEarlyClobber: OS << ":[regdef-ec]"; break; default: OS << ":[??" << InlineAsm::getKind(Flag) << ']'; break; } |