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Never add a kill flag to a constrained physical register in a two-addr instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77906 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2009-08-02 19:13:03 +00:00
parent 0e6a4efdd4
commit ece4818516
3 changed files with 3 additions and 6 deletions
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3
lib/CodeGen/MachineInstr.cpp
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@ -1041,6 +1041,9 @@ bool MachineInstr::addRegisterKilled(unsigned IncomingReg,
if (MO.isKill())
// The register is already marked kill.
return true;
if (isPhysReg && isRegTiedToDefOperand(i))
// Two-address uses of physregs must not be marked kill.
return true;
MO.setIsKill();
Found = true;
}

3
test/CodeGen/Blackfin/cmp-small-imm.ll
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@ -1,7 +1,4 @@
; RUN: llvm-as < %s | llc -march=bfin > %t
; XFAIL: *
; Assertion failed: (isUsed(Reg) && "Using an undefined register!")
; function forward, file RegisterScavenging.cpp, line 259.
define i1 @cmp3(i32 %A) {
%R = icmp uge i32 %A, 2

3
test/CodeGen/Blackfin/promote-setcc.ll
View File

@ -1,7 +1,4 @@
; RUN: llvm-as < %s | llc -march=bfin > %t
; XFAIL: *
; Assertion failed: (isUsed(Reg) && "Using an undefined register!"),
; function forward, file RegisterScavenging.cpp, line 259.
; The DAG combiner may sometimes create illegal i16 SETCC operations when run
; after LegalizeOps. Try to tease out all the optimizations in