derek.holloway
7502bf64a4
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74 lines
2.0 KiB
LLVM
74 lines
2.0 KiB
LLVM
; RUN: llc --verify-machineinstrs --force-dwarf-frame-section %s -o - | FileCheck %s
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv7m-unknown-unknown-eabi"
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; Derived from
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; volatile int a, b, c, d, e, f, g, h;
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;
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; int x() {
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; int r = a + b + c + d + e + f;
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; return r + 1;
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; }
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;
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;
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; int y() {
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; int r = a + b + c + d + e + f;
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; return r + 2;
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; }
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; Check CFI instructions when LR is saved/restored to/from a register.
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@a = dso_local global i32 0, align 4
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@b = dso_local global i32 0, align 4
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@c = dso_local global i32 0, align 4
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@d = dso_local global i32 0, align 4
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@e = dso_local global i32 0, align 4
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@f = dso_local global i32 0, align 4
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define dso_local i32 @x() local_unnamed_addr #0 {
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entry:
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%0 = load volatile i32, ptr @a, align 4
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%1 = load volatile i32, ptr @b, align 4
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%2 = load volatile i32, ptr @c, align 4
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%3 = load volatile i32, ptr @d, align 4
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%4 = load volatile i32, ptr @e, align 4
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%5 = load volatile i32, ptr @f, align 4
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%add = add i32 %0, 1
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%add1 = add i32 %add, %1
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%add2 = add i32 %add1, %2
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%add3 = add i32 %add2, %3
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%add4 = add i32 %add3, %4
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%add5 = add i32 %add4, %5
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ret i32 %add5
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}
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; CHECK-LABEL: x:
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; CHECK: mov r3, lr
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; CHECK-NEXT: .cfi_register lr, r3
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; CHECK-NEXT: bl OUTLINED_FUNCTION_0
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; CHECK-NEXT: mov lr, r3
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; CHECK-NEXT: .cfi_restore lr
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define dso_local i32 @y() local_unnamed_addr #0 {
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entry:
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%0 = load volatile i32, ptr @a, align 4
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%1 = load volatile i32, ptr @b, align 4
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%2 = load volatile i32, ptr @c, align 4
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%3 = load volatile i32, ptr @d, align 4
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%4 = load volatile i32, ptr @e, align 4
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%5 = load volatile i32, ptr @f, align 4
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%add = add i32 %0, 2
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%add1 = add i32 %add, %1
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%add2 = add i32 %add1, %2
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%add3 = add i32 %add2, %3
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%add4 = add i32 %add3, %4
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%add5 = add i32 %add4, %5
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ret i32 %add5
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}
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; CHECK-LABEL: y:
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; CHECK: mov r3, lr
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; CHECK-NEXT: .cfi_register lr, r3
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; CHECK-NEXT: bl OUTLINED_FUNCTION_0
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; CHECK-NEXT: mov lr, r3
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; CHECK-NEXT: .cfi_restore lr
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attributes #0 = { minsize nofree norecurse nounwind optsize }
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