79 lines
2.3 KiB
LLVM
79 lines
2.3 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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; __attribute__((noinline)) int h(int a, int b) { return a + b; }
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;
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; int f(int a, int b, int c, int d) {
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; if (a < 0)
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; return -1;
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; a = h(a, b);
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; return 2 + 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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; if (a < 0)
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; return -1;
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; a = h(a, b);
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; return 1 + a * (a + b) / (c + d);
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; }
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; Check CFI instructions inside the outlined function.
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define dso_local i32 @h(i32 %a, i32 %b) local_unnamed_addr #0 {
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entry:
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%add = add nsw i32 %b, %a
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ret i32 %add
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}
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define dso_local i32 @f(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #1 {
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entry:
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%cmp = icmp slt i32 %a, 0
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br i1 %cmp, label %return, label %if.end
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if.end: ; preds = %entry
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%call = tail call i32 @h(i32 %a, i32 %b) #2
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%add = add nsw i32 %call, %b
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%mul = mul nsw i32 %add, %call
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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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br label %return
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return: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %add2, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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define dso_local i32 @g(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #1 {
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entry:
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%cmp = icmp slt i32 %a, 0
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br i1 %cmp, label %return, label %if.end
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if.end: ; preds = %entry
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%call = tail call i32 @h(i32 %a, i32 %b) #2
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%add = add nsw i32 %call, %b
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%mul = mul nsw i32 %add, %call
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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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br label %return
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return: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %add2, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: OUTLINED_FUNCTION_0:
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; CHECK: str lr, [sp, #-8]!
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .cfi_offset lr, -8
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; CHECK: ldr lr, [sp], #8
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; CHECK-NEXT: .cfi_def_cfa_offset 0
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; CHECK-NEXT: .cfi_restore lr
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; CHECK-NEXT: bx lr
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attributes #0 = { minsize noinline norecurse nounwind optsize readnone }
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attributes #1 = { minsize norecurse nounwind optsize readnone }
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attributes #2 = { minsize optsize }
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