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1a347f2b7a
This extends the use of this attribute on ARM and AArch64 from SVN r325900 (where it was only checked for fixed stack allocations on ARM/AArch64, but for all stack allocations on X86). This also adds a testcase for the existing use of disabling the fixed stack probe with the attribute on ARM and AArch64. Differential Revision: https://reviews.llvm.org/D44291 llvm-svn: 327897
22 lines
612 B
LLVM
22 lines
612 B
LLVM
; RUN: llc -mtriple thumbv7-windows -filetype asm -o - %s | FileCheck %s
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declare arm_aapcs_vfpcc i32 @num_entries()
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define arm_aapcs_vfpcc void @test___builtin_alloca() "no-stack-arg-probe" {
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entry:
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%array = alloca i8*, align 4
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%call = call arm_aapcs_vfpcc i32 @num_entries()
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%mul = mul i32 4, %call
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%0 = alloca i8, i32 %mul
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store i8* %0, i8** %array, align 4
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ret void
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}
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; CHECK: bl num_entries
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; CHECK: movs [[R1:r[0-9]+]], #7
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; CHECK: add.w [[R0:r[0-9]+]], [[R1]], [[R0]], lsl #2
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; CHECK: bic [[R0]], [[R0]], #7
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; CHECK-NOT: bl __chkstk
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; CHECK: sub.w [[R0]], sp, [[R0]]
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; CHECK: mov sp, [[R0]]
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