mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-23 17:29:19 +00:00
Remove predicates when changing an add into an unpredicable mov.
Since the mov is executed unconditionally, make sure that the add didn't have any predicate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93909 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
dcff928b59
commit
35f0febcb6
@ -479,11 +479,15 @@ Thumb1RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
|
||||
"Thumb add/sub sp, #imm immediate must be multiple of 4!");
|
||||
}
|
||||
|
||||
if (Offset == 0) {
|
||||
unsigned PredReg;
|
||||
if (Offset == 0 && getInstrPredicate(&MI, PredReg) == ARMCC::AL) {
|
||||
// Turn it into a move.
|
||||
MI.setDesc(TII.get(ARM::tMOVgpr2tgpr));
|
||||
MI.getOperand(i).ChangeToRegister(FrameReg, false);
|
||||
MI.RemoveOperand(i+1);
|
||||
// Remove offset and remaining explicit predicate operands.
|
||||
do MI.RemoveOperand(i+1);
|
||||
while (MI.getNumOperands() > i+1 &&
|
||||
(!MI.getOperand(i+1).isReg() || !MI.getOperand(i+1).isImm()));
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -329,12 +329,16 @@ bool llvm::rewriteT2FrameIndex(MachineInstr &MI, unsigned FrameRegIdx,
|
||||
Offset += MI.getOperand(FrameRegIdx+1).getImm();
|
||||
|
||||
bool isSP = FrameReg == ARM::SP;
|
||||
if (Offset == 0) {
|
||||
unsigned PredReg;
|
||||
if (Offset == 0 && getInstrPredicate(&MI, PredReg) == ARMCC::AL) {
|
||||
// Turn it into a move.
|
||||
MI.setDesc(TII.get(ARM::tMOVgpr2gpr));
|
||||
MI.getOperand(FrameRegIdx).ChangeToRegister(FrameReg, false);
|
||||
MI.RemoveOperand(FrameRegIdx+1);
|
||||
Offset = 0;
|
||||
// Remove offset and remaining explicit predicate operands.
|
||||
do MI.RemoveOperand(FrameRegIdx+1);
|
||||
while (MI.getNumOperands() > FrameRegIdx+1 &&
|
||||
(!MI.getOperand(FrameRegIdx+1).isReg() ||
|
||||
!MI.getOperand(FrameRegIdx+1).isImm()));
|
||||
return true;
|
||||
}
|
||||
|
||||
|
53
test/CodeGen/Thumb2/2010-01-19-RemovePredicates.ll
Normal file
53
test/CodeGen/Thumb2/2010-01-19-RemovePredicates.ll
Normal file
@ -0,0 +1,53 @@
|
||||
; RUN: llc -O3 -relocation-model=pic -mcpu=cortex-a8 -mattr=+thumb2 < %s
|
||||
;
|
||||
; This test creates a predicated t2ADDri instruction that is then turned into a t2MOVgpr2gpr instr.
|
||||
; Test that that the predicate operands are removed properly.
|
||||
;
|
||||
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
|
||||
target triple = "thumbv7-apple-darwin10"
|
||||
|
||||
declare arm_apcscc void @etoe53(i16* nocapture, i16* nocapture) nounwind
|
||||
|
||||
define arm_apcscc void @earith(double* nocapture %value, i32 %icode, double* nocapture %r1, double* nocapture %r2) nounwind {
|
||||
entry:
|
||||
%v = alloca [6 x i16], align 4 ; <[6 x i16]*> [#uses=1]
|
||||
br i1 undef, label %bb2.i, label %bb5
|
||||
|
||||
bb2.i: ; preds = %entry
|
||||
%0 = bitcast double* %value to i16* ; <i16*> [#uses=1]
|
||||
call arm_apcscc void @etoe53(i16* null, i16* %0) nounwind
|
||||
ret void
|
||||
|
||||
bb5: ; preds = %entry
|
||||
switch i32 %icode, label %bb10 [
|
||||
i32 57, label %bb14
|
||||
i32 58, label %bb18
|
||||
i32 67, label %bb22
|
||||
i32 76, label %bb26
|
||||
i32 77, label %bb35
|
||||
]
|
||||
|
||||
bb10: ; preds = %bb5
|
||||
br label %bb46
|
||||
|
||||
bb14: ; preds = %bb5
|
||||
unreachable
|
||||
|
||||
bb18: ; preds = %bb5
|
||||
unreachable
|
||||
|
||||
bb22: ; preds = %bb5
|
||||
unreachable
|
||||
|
||||
bb26: ; preds = %bb5
|
||||
br label %bb46
|
||||
|
||||
bb35: ; preds = %bb5
|
||||
unreachable
|
||||
|
||||
bb46: ; preds = %bb26, %bb10
|
||||
%1 = bitcast double* %value to i16* ; <i16*> [#uses=1]
|
||||
%v47 = getelementptr inbounds [6 x i16]* %v, i32 0, i32 0 ; <i16*> [#uses=1]
|
||||
call arm_apcscc void @etoe53(i16* %v47, i16* %1) nounwind
|
||||
ret void
|
||||
}
|
Loading…
Reference in New Issue
Block a user