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Reduce the number of nops emitted for stackmap shadows on AArch64 by counting non-stackmap instructions up to the next branch target towards the requested shadow. <rdar://problem/14959522> llvm-svn: 223156
16 lines
511 B
LLVM
16 lines
511 B
LLVM
; RUN: llc < %s -mtriple=arm64-apple-darwin | FileCheck %s
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define void @test_shadow_optimization() {
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entry:
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; Expect 8 bytes worth of nops here rather than 16: With the shadow optimization
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; in place, 8 bytes will be consumed by the frame teardown and return instr.
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; CHECK-LABEL: test_shadow_optimization:
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; CHECK: nop
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; CHECK-NEXT: nop
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; CHECK-NOT: nop
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tail call void (i64, i32, ...)* @llvm.experimental.stackmap(i64 0, i32 16)
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ret void
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}
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declare void @llvm.experimental.stackmap(i64, i32, ...)
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