c3b98194df
This reverts commit edb7ba714a.
This changes BLR_BTI to take variable_ops meaning that we can accept
a register or a label. The pattern still expects one argument so we'll
never get more than one. Then later we can check the type of the operand
to choose BL or BLR to emit.
(this is what BLR_RVMARKER does but I missed this detail of it first time around)
Also require NoSLSBLRMitigation which I missed in the first version.
56 lines
1.6 KiB
LLVM
56 lines
1.6 KiB
LLVM
; RUN: llc -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s --check-prefix=BTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -global-isel < %s | FileCheck %s --check-prefix=BTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -fast-isel < %s | FileCheck %s --check-prefix=BTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -mattr=+no-bti-at-return-twice < %s | \
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; RUN: FileCheck %s --check-prefix=NOBTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -global-isel -mattr=+no-bti-at-return-twice < %s | \
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; RUN: FileCheck %s --check-prefix=NOBTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -fast-isel -mattr=+no-bti-at-return-twice < %s | \
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; RUN: FileCheck %s --check-prefix=NOBTI
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; C source
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; --------
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; extern int setjmp(void*);
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; extern void notsetjmp(void);
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;
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; void bbb(void) {
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; setjmp(0);
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; int (*fnptr)(void*) = setjmp;
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; fnptr(0);
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; notsetjmp();
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; }
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define void @bbb() {
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; BTI-LABEL: bbb:
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; BTI: bl setjmp
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; BTI-NEXT: hint #36
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; BTI: blr x{{[0-9]+}}
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; BTI-NEXT: hint #36
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; BTI: bl notsetjmp
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; BTI-NOT: hint #36
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; NOBTI-LABEL: bbb:
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; NOBTI: bl setjmp
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; NOBTI-NOT: hint #36
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; NOBTI: blr x{{[0-9]+}}
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; NOBTI-NOT: hint #36
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; NOBTI: bl notsetjmp
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; NOBTI-NOT: hint #36
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entry:
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%fnptr = alloca i32 (i8*)*, align 8
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%call = call i32 @setjmp(i8* noundef null) #0
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store i32 (i8*)* @setjmp, i32 (i8*)** %fnptr, align 8
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%0 = load i32 (i8*)*, i32 (i8*)** %fnptr, align 8
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%call1 = call i32 %0(i8* noundef null) #0
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call void @notsetjmp()
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ret void
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}
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declare i32 @setjmp(i8* noundef) #0
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declare void @notsetjmp()
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attributes #0 = { returns_twice }
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"branch-target-enforcement", i32 1}
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