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[AArch64] Enable shrink-wrapping by default.

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Differential Revision: http://reviews.llvm.org/D14360

rdar://problem/20820748


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253520 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Quentin Colombet 2015-11-18 23:12:20 +00:00
parent 5b7b529be0
commit 3fe74b8026
2 changed files with 6 additions and 1 deletions
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5
lib/Target/AArch64/AArch64FrameLowering.h
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@ -60,6 +60,11 @@ public:
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
RegScavenger *RS) const override;
/// Returns true if the target will correctly handle shrink wrapping.
bool enableShrinkWrapping(const MachineFunction &MF) const override {
return true;
}
};
} // End llvm namespace

2
test/CodeGen/AArch64/aarch64-dynamic-stack-layout.ll
View File

@ -522,10 +522,10 @@ bb1:
; CHECK-LABEL: realign_conditional2
; Extra realignment in the prologue (performance issue).
; CHECK: tbz {{.*}} .[[LABEL:.*]]
; CHECK: sub x9, sp, #32 // =32
; CHECK: and sp, x9, #0xffffffffffffffe0
; CHECK: mov x19, sp
; CHECK: tbz {{.*}} .[[LABEL:.*]]
; Stack is realigned in a non-entry BB.
; CHECK: sub [[REG:x[01-9]+]], sp, #64
; CHECK: and sp, [[REG]], #0xffffffffffffffe0