derek.holloway
7502bf64a4
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81 lines
2.6 KiB
LLVM
81 lines
2.6 KiB
LLVM
; RUN: llc -mtriple=aarch64-none-linux-gnu -enable-machine-outliner < %s | FileCheck %s --check-prefix=BTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -global-isel -enable-machine-outliner < %s | \
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; RUN: FileCheck %s --check-prefix=BTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -fast-isel -enable-machine-outliner < %s | \
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; RUN: FileCheck %s --check-prefix=BTI
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; RUN: llc -mtriple=aarch64-none-linux-gnu -enable-machine-outliner -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 -enable-machine-outliner -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 -enable-machine-outliner -mattr=+no-bti-at-return-twice < %s | \
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; RUN: FileCheck %s --check-prefix=NOBTI
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; Check that the outliner does not split up the call to setjmp and the bti after it.
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; When we do not insert a bti, it is allowed to move the setjmp call into an outlined function.
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; C source
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; --------
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; extern int setjmp(ptr);
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;
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; int f(int a, int b, int c, int d) {
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; setjmp(0);
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; return 1 + a * (a + b) / (c + d);
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; }
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;
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; int g(int a, int b, int c, int d) {
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; setjmp(0);
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; return 2 + a * (a + b) / (c + d);
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; }
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define i32 @f(i32 noundef %a, i32 noundef %b, i32 noundef %c, i32 noundef %d) #0 {
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; BTI-LABEL: f:
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; BTI: bl OUTLINED_FUNCTION_1
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; BTI-NEXT: bl setjmp
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; BTI-NEXT: hint #36
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; BTI-NEXT: bl OUTLINED_FUNCTION_0
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; NOBTI: f:
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; NOBTI: bl OUTLINED_FUNCTION_0
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; NOBTI-NEXT: bl OUTLINED_FUNCTION_1
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entry:
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%call = call i32 @setjmp(ptr noundef null) #1
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%add = add nsw i32 %b, %a
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%mul = mul nsw i32 %add, %a
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%add1 = add nsw i32 %d, %c
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%div = sdiv i32 %mul, %add1
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%add2 = add nsw i32 %div, 1
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ret i32 %add2
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}
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declare i32 @setjmp(ptr noundef) #0
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define i32 @g(i32 noundef %a, i32 noundef %b, i32 noundef %c, i32 noundef %d) #0 {
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; BTI-LABEL: g:
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; BTI: bl OUTLINED_FUNCTION_1
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; BTI-NEXT: bl setjmp
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; BTI-NEXT: hint #36
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; BTI-NEXT: bl OUTLINED_FUNCTION_0
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; NOBTI: g:
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; NOBTI: bl OUTLINED_FUNCTION_0
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; NOBTI-NEXT: bl OUTLINED_FUNCTION_1
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entry:
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%call = call i32 @setjmp(ptr noundef null) #1
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%add = add nsw i32 %b, %a
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%mul = mul nsw i32 %add, %a
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%add1 = add nsw i32 %d, %c
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%div = sdiv i32 %mul, %add1
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%add2 = add nsw i32 %div, 2
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ret i32 %add2
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}
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; NOBTI-LABEL: OUTLINED_FUNCTION_0:
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; NOBTI: b setjmp
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; NOBTI: OUTLINED_FUNCTION_1:
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; NOBTI-LABEL: ret
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attributes #0 = { "branch-target-enforcement" }
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attributes #1 = { returns_twice }
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