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; RUN: llc -mtriple=thumbv7m-eabi %s -o - | FileCheck %s
; Check an edge case of the outlining costs -
; outlining occurs in this test and does not in `bti-outliner-cost-2.ll`
; the only difference being the branch target enforcement is enabled in the
; latter one.
; volatile int a, b, c, d, e;
;
; int y(int p) {
; int r = (a + b) / (c + d) * e;
; return r + 1;
; }
;
; int y(int p) {
; int r = (a + b) / (c + d) * e;
; return r + 2;
; }
@a = hidden global i32 0, align 4
@b = hidden global i32 0, align 4
@c = hidden global i32 0, align 4
@d = hidden global i32 0, align 4
@e = hidden global i32 0, align 4
define hidden i32 @x(i32 %p) local_unnamed_addr #0 {
entry:
%0 = load volatile i32, ptr @a, align 4
%1 = load volatile i32, ptr @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, ptr @c, align 4
%3 = load volatile i32, ptr @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, ptr @e, align 4
%mul = mul nsw i32 %4, %div
%add2 = add nsw i32 %mul, 1
ret i32 %add2
}
; CHECK-LABEL: x:
; CHECK: bl OUTLINED_FUNCTION_0
define hidden i32 @y(i32 %p) local_unnamed_addr #0 {
entry:
%0 = load volatile i32, ptr @a, align 4
%1 = load volatile i32, ptr @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, ptr @c, align 4
%3 = load volatile i32, ptr @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, ptr @e, align 4
%mul = mul nsw i32 %4, %div
%add2 = add nsw i32 %mul, 2
ret i32 %add2
}
; CHECK-LABEL: y:
; CHECK: bl OUTLINED_FUNCTION_0
; CHECK-LABEL: OUTLINED_FUNCTION_0:
; CHECK-NOT: bti
attributes #0 = { minsize nofree norecurse nounwind optsize }
!llvm.module.flags = !{!0}
!0 = !{i32 8, !"branch-target-enforcement", i32 0}
|
