derek.holloway
7502bf64a4
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76 lines
2.6 KiB
LLVM
76 lines
2.6 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=+harden-sls-blr< %s | FileCheck %s --check-prefix=BTISLS
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; RUN: llc -mtriple=aarch64-none-linux-gnu -global-isel -mattr=+harden-sls-blr< %s | FileCheck %s --check-prefix=BTISLS
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; RUN: llc -mtriple=aarch64-none-linux-gnu -fast-isel -mattr=+harden-sls-blr< %s | FileCheck %s --check-prefix=BTISLS
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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(ptr);
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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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; setjmp(0); // With the attributes removed.
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; int (*fnptr)(ptr) = setjmp;
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; fnptr(0); // With attributes added.
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; notsetjmp();
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; }
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define void @bbb() #1 {
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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: 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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; BTISLS-LABEL: bbb:
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; BTISLS: bl setjmp
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; BTISLS-NEXT: hint #36
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; BTISLS: bl setjmp
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; BTISLS-NEXT: hint #36
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; BTISLS: bl __llvm_slsblr_thunk_x{{[0-9]+}}
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; BTISLS-NEXT: hint #36
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; BTISLS: bl notsetjmp
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; BTISLS-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: 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 ptr, align 8
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; The frontend may apply attributes to the call, but it doesn't have to. We
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; should be looking at the call base, which looks past that to the called function.
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%call = call i32 @setjmp(ptr noundef null) #0
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%call1 = call i32 @setjmp(ptr noundef null)
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store ptr @setjmp, ptr %fnptr, align 8
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%0 = load ptr, ptr %fnptr, align 8
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; Clang does not attach the attribute here but if it did, it should work.
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%call2 = call i32 %0(ptr 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(ptr noundef) #0
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declare void @notsetjmp()
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attributes #0 = { returns_twice }
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attributes #1 = { "branch-target-enforcement" }
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