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993081c749
Summary: Make AArch64InstrInfo::foldMemoryOperandImpl more general by folding all full COPYs between register classes of the same size that are either spilled or refilled. Reviewers: MatzeB, qcolombet Subscribers: aemerson, rengolin, mcrosier, llvm-commits Differential Revision: https://reviews.llvm.org/D27271 llvm-svn: 288439
31 lines
758 B
LLVM
31 lines
758 B
LLVM
; RUN: llc -verify-machineinstrs -o - %s -mtriple=aarch64-linux-gnu | FileCheck %s
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@var32 = global i32 0
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@var64 = global i64 0
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define void @test_zr() {
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; CHECK-LABEL: test_zr:
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store i32 0, i32* @var32
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; CHECK: str wzr, [{{x[0-9]+}}, {{#?}}:lo12:var32]
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store i64 0, i64* @var64
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; CHECK: str xzr, [{{x[0-9]+}}, {{#?}}:lo12:var64]
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ret void
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; CHECK: ret
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}
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define void @test_sp(i32 %val) {
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; CHECK-LABEL: test_sp:
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; Important correctness point here is that LLVM doesn't try to use xzr
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; as an addressing register: "str w0, [xzr]" is not a valid A64
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; instruction (0b11111 in the Rn field would mean "sp").
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%addr = getelementptr i32, i32* null, i64 0
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store i32 %val, i32* %addr
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; CHECK: str {{w[0-9]+}}, [{{x[0-9]+|sp}}]
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ret void
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; CHECK: ret
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}
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