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llvm-6502/test/CodeGen/ARM/debug-frame-vararg.ll
Joerg Sonnenberger b84f890bc3 If a function needs a frame pointer, but r11 (aka fp) has not been used, 
remove it from the list of unspilled registers. Otherwise the following
attempt to keep the stack aligned by picking an extra GPR register to
spill will not work as it picks up r11.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208129 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-06 20:43:01 +00:00

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LLVM
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; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype asm -o - %s | FileCheck %s --check-prefix=CHECK-FP
; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype asm -o - %s -disable-fp-elim | FileCheck %s --check-prefix=CHECK-FP-ELIM
; RUN: llc -mtriple thumb-unknown-linux-gnueabi -filetype asm -o - %s | FileCheck %s --check-prefix=CHECK-THUMB-FP
; RUN: llc -mtriple thumb-unknown-linux-gnueabi -filetype asm -o - %s -disable-fp-elim | FileCheck %s --check-prefix=CHECK-THUMB-FP-ELIM
; Tests that the initial space allocated to the varargs on the stack is
; taken into account in the the .cfi_ directives.
; Generated from the C program:
; #include <stdarg.h>
;
; extern int foo(int);
;
; int sum(int count, ...) {
; va_list vl;
; va_start(vl, count);
; int sum = 0;
; for (int i = 0; i < count; i++) {
; sum += foo(va_arg(vl, int));
; }
; va_end(vl);
; }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!9, !10}
!llvm.ident = !{!11}
!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.5 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/tmp/var.c] [DW_LANG_C99]
!1 = metadata !{metadata !"var.c", metadata !"/tmp"}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"sum", metadata !"sum", metadata !"", i32 5, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32, ...)* @sum, null, null, metadata !2, i32 5} ; [ DW_TAG_subprogram ] [line 5] [def] [sum]
!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/var.c]
!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{metadata !8, metadata !8}
!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
!9 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!10 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
!11 = metadata !{metadata !"clang version 3.5 "}
!12 = metadata !{i32 786689, metadata !4, metadata !"count", metadata !5, i32 16777221, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [count] [line 5]
!13 = metadata !{i32 5, i32 0, metadata !4, null}
!14 = metadata !{i32 786688, metadata !4, metadata !"vl", metadata !5, i32 6, metadata !15, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [vl] [line 6]
!15 = metadata !{i32 786454, metadata !16, null, metadata !"va_list", i32 30, i64 0, i64 0, i64 0, i32 0, metadata !17} ; [ DW_TAG_typedef ] [va_list] [line 30, size 0, align 0, offset 0] [from __builtin_va_list]
!16 = metadata !{metadata !"/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.5/include/stdarg.h", metadata !"/tmp"}
!17 = metadata !{i32 786454, metadata !1, null, metadata !"__builtin_va_list", i32 6, i64 0, i64 0, i64 0, i32 0, metadata !18} ; [ DW_TAG_typedef ] [__builtin_va_list] [line 6, size 0, align 0, offset 0] [from __va_list]
!18 = metadata !{i32 786451, metadata !1, null, metadata !"__va_list", i32 6, i64 32, i64 32, i32 0, i32 0, null, metadata !19, i32 0, null, null, null} ; [ DW_TAG_structure_type ] [__va_list] [line 6, size 32, align 32, offset 0] [def] [from ]
!19 = metadata !{metadata !20}
!20 = metadata !{i32 786445, metadata !1, metadata !18, metadata !"__ap", i32 6, i64 32, i64 32, i64 0, i32 0, metadata !21} ; [ DW_TAG_member ] [__ap] [line 6, size 32, align 32, offset 0] [from ]
!21 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 32, i64 32, i64 0, i32 0, null} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from ]
!22 = metadata !{i32 6, i32 0, metadata !4, null}
!23 = metadata !{i32 7, i32 0, metadata !4, null}
!24 = metadata !{i32 786688, metadata !4, metadata !"sum", metadata !5, i32 8, metadata !8, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [sum] [line 8]
!25 = metadata !{i32 8, i32 0, metadata !4, null} ; [ DW_TAG_imported_declaration ]
!26 = metadata !{i32 786688, metadata !27, metadata !"i", metadata !5, i32 9, metadata !8, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [i] [line 9]
!27 = metadata !{i32 786443, metadata !1, metadata !4, i32 9, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [/tmp/var.c]
!28 = metadata !{i32 9, i32 0, metadata !27, null}
!29 = metadata !{i32 10, i32 0, metadata !30, null}
!30 = metadata !{i32 786443, metadata !1, metadata !27, i32 9, i32 0, i32 1} ; [ DW_TAG_lexical_block ] [/tmp/var.c]
!31 = metadata !{i32 11, i32 0, metadata !30, null}
!32 = metadata !{i32 12, i32 0, metadata !4, null}
!33 = metadata !{i32 13, i32 0, metadata !4, null}
; CHECK-FP-LABEL: sum
; CHECK-FP: .cfi_startproc
; CHECK-FP: sub sp, sp, #16
; CHECK-FP: .cfi_def_cfa_offset 16
; CHECK-FP: push {r4, lr}
; CHECK-FP: .cfi_def_cfa_offset 24
; CHECK-FP: .cfi_offset lr, -20
; CHECK-FP: .cfi_offset r4, -24
; CHECK-FP: sub sp, sp, #8
; CHECK-FP: .cfi_def_cfa_offset 32
; CHECK-FP-ELIM-LABEL: sum
; CHECK-FP-ELIM: .cfi_startproc
; CHECK-FP-ELIM: sub sp, sp, #16
; CHECK-FP-ELIM: .cfi_def_cfa_offset 16
; CHECK-FP-ELIM: push {r4, r10, r11, lr}
; CHECK-FP-ELIM: .cfi_def_cfa_offset 32
; CHECK-FP-ELIM: .cfi_offset lr, -20
; CHECK-FP-ELIM: .cfi_offset r11, -24
; CHECK-FP-ELIM: .cfi_offset r10, -28
; CHECK-FP-ELIM: .cfi_offset r4, -32
; CHECK-FP-ELIM: add r11, sp, #8
; CHECK-FP-ELIM: .cfi_def_cfa r11, 24
; CHECK-THUMB-FP-LABEL: sum
; CHECK-THUMB-FP: .cfi_startproc
; CHECK-THUMB-FP: sub sp, #16
; CHECK-THUMB-FP: .cfi_def_cfa_offset 16
; CHECK-THUMB-FP: push {r4, r5, r7, lr}
; CHECK-THUMB-FP: .cfi_def_cfa_offset 32
; CHECK-THUMB-FP: .cfi_offset lr, -20
; CHECK-THUMB-FP: .cfi_offset r7, -24
; CHECK-THUMB-FP: .cfi_offset r5, -28
; CHECK-THUMB-FP: .cfi_offset r4, -32
; CHECK-THUMB-FP: sub sp, #8
; CHECK-THUMB-FP: .cfi_def_cfa_offset 40
; CHECK-THUMB-FP-ELIM-LABEL: sum
; CHECK-THUMB-FP-ELIM: .cfi_startproc
; CHECK-THUMB-FP-ELIM: sub sp, #16
; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 16
; CHECK-THUMB-FP-ELIM: push {r4, r5, r7, lr}
; CHECK-THUMB-FP-ELIM: .cfi_def_cfa_offset 32
; CHECK-THUMB-FP-ELIM: .cfi_offset lr, -20
; CHECK-THUMB-FP-ELIM: .cfi_offset r7, -24
; CHECK-THUMB-FP-ELIM: .cfi_offset r5, -28
; CHECK-THUMB-FP-ELIM: .cfi_offset r4, -32
; CHECK-THUMB-FP-ELIM: add r7, sp, #8
; CHECK-THUMB-FP-ELIM: .cfi_def_cfa r7, 24
define i32 @sum(i32 %count, ...) {
entry:
%vl = alloca i8*, align 4
%vl1 = bitcast i8** %vl to i8*
call void @llvm.va_start(i8* %vl1)
%cmp4 = icmp sgt i32 %count, 0
br i1 %cmp4, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
%ap.cur = load i8** %vl, align 4
%ap.next = getelementptr i8* %ap.cur, i32 4
store i8* %ap.next, i8** %vl, align 4
%0 = bitcast i8* %ap.cur to i32*
%1 = load i32* %0, align 4
%call = call i32 @foo(i32 %1) #1
%inc = add nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, %count
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
call void @llvm.va_end(i8* %vl1)
ret i32 undef
}
declare void @llvm.va_start(i8*) nounwind
declare i32 @foo(i32)
declare void @llvm.va_end(i8*) nounwind
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