forked from OSchip/llvm-project
163 lines
4.8 KiB
LLVM
163 lines
4.8 KiB
LLVM
; RUN: llc --force-dwarf-frame-section %s -o - | FileCheck %s
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; RUN: llc --filetype=obj %s -o - | llvm-readelf -s --unwind - | FileCheck %s --check-prefix=UNWIND
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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-arm-none-eabi"
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; -Oz
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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(11 * a - b, 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(11 * a - b, b);
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; return 1 + a * (a + b) / (c + d);
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; }
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define hidden 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 hidden i32 @f(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
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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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%mul = mul nsw i32 %a, 11
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%sub = sub nsw i32 %mul, %b
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%call = tail call i32 @h(i32 %sub, i32 %b)
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%add = add nsw i32 %call, %b
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%mul1 = mul nsw i32 %add, %call
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%add2 = add nsw i32 %d, %c
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%div = sdiv i32 %mul1, %add2
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%add3 = 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 [ %add3, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: f:
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; ...
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r4, r5, r6, lr}
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; CHECK-NEXT: push {r4, r5, r6, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r6, -8
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; CHECK-NEXT: .cfi_offset r5, -12
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; CHECK-NEXT: .cfi_offset r4, -16
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 20
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; CHECK-NEXT: .cfi_offset ra_auth_code, -20
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; CHECK-NEXT: .cfi_def_cfa_offset 24
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; ...
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; CHECK: bl OUTLINED_FUNCTION_0
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; ...
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; CHECK: add sp, #4
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; CHECK-NEXT: ldr r12, [sp], #4
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; CHECK-NEXT: pop.w {r4, r5, r6, lr}
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: bx lr
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define hidden i32 @g(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
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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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%mul = mul nsw i32 %a, 11
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%sub = sub nsw i32 %mul, %b
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%call = tail call i32 @h(i32 %sub, i32 %b)
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%add = add nsw i32 %call, %b
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%mul1 = mul nsw i32 %add, %call
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%add2 = add nsw i32 %d, %c
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%div = sdiv i32 %mul1, %add2
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%add3 = 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 [ %add3, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: g:
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r4, r5, r6, lr}
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; CHECK-NEXT: push {r4, r5, r6, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r6, -8
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; CHECK-NEXT: .cfi_offset r5, -12
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; CHECK-NEXT: .cfi_offset r4, -16
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 20
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; CHECK-NEXT: .cfi_offset ra_auth_code, -20
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; CHECK-NEXT: .cfi_def_cfa_offset 24
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; ...
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; CHECK: bl OUTLINED_FUNCTION_0
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; ...
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; CHECK: add sp, #4
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; CHECK-NEXT: ldr r12, [sp], #4
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; CHECK-NEXT: pop.w {r4, r5, r6, lr}
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: bx lr
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; CHECK-LABEL: OUTLINED_FUNCTION_0:
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {ra_auth_code, lr}
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; CHECK-NEXT: strd r12, lr, [sp, #-8]!
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset ra_auth_code, -8
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; ...
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; CHECK: ldrd r12, 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: .cfi_undefined ra_auth_code
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: bx lr
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attributes #0 = { minsize noinline norecurse nounwind optsize readnone uwtable }
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!llvm.module.flags = !{!0, !1, !2}
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!0 = !{i32 8, !"branch-target-enforcement", i32 0}
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!1 = !{i32 8, !"sign-return-address", i32 1}
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!2 = !{i32 8, !"sign-return-address-all", i32 0}
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; UNWIND-LABEL: FunctionAddress: 0x4
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; UNWIND: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
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; UNWIND-LABEL: FunctionAddress: 0x30
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; UNWIND: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
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; UNWIND-LABEL: FunctionAddress: 0x5C
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; UNWIND: 0xB4 ; pop ra_auth_code
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; UNWIND: 0x84 0x00 ; pop {lr}
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; UNWIND-LABEL: 0000005d {{.*}} OUTLINED_FUNCTION_0
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; UNWIND-LABEL: 00000005 {{.*}} f
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; UNWIND-LABEL: 00000031 {{.*}} g
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