Add backend dignostic printer for unsupported features

The related LLVM patch adds a backend diagnostic type for reporting
unsupported features, this adds a printer for them to clang.

In the case where debug location information is not available, I've
changed the printer to report the location as the first line of the
function, rather than the closing brace, as the latter does not give the
user any information. This also affects optimisation remarks.

Differential Revision: http://reviews.llvm.org/D16591

llvm-svn: 258950

1 files changed, 45 insertions, 0 deletions

diff --git a/clang/test/CodeGen/backend-unsupported-error.ll b/clang/test/CodeGen/backend-unsupported-error.ll
new file mode 100644
index 00000000000..467897b5c93
--- /dev/null
+++ b/clang/test/CodeGen/backend-unsupported-error.ll
@@ -0,0 +1,45 @@
+; RUN: not %clang_cc1 -triple r600-unknown-unknown -S -o - %s 2>&1 | FileCheck %s
+; REQUIRES: amdgpu-registered-target
+
+; This is to check that backend errors for unsupported features are formatted correctly
+
+; CHECK: error: test.c:2:20: in function bar i32 (): unsupported call to function foo.2
+
+target triple = "r600-unknown-unknown"
+
+; Function Attrs: nounwind uwtable
+define i32 @bar() #0 !dbg !4 {
+entry:
+  %call = call i32 @foo(), !dbg !12
+  ret i32 %call, !dbg !13
+}
+
+; Function Attrs: nounwind uwtable
+define i32 @foo() #0 !dbg !8 {
+entry:
+  %call = call i32 @bar(), !dbg !14
+  ret i32 %call, !dbg !15
+}
+
+attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!9, !10}
+!llvm.ident = !{!11}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
+!1 = !DIFile(filename: "test.c", directory: "")
+!2 = !{}
+!3 = !{!4, !8}
+!4 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: false, variables: !2)
+!5 = !DISubroutineType(types: !6)
+!6 = !{!7}
+!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
+!9 = !{i32 2, !"Dwarf Version", i32 4}
+!10 = !{i32 2, !"Debug Info Version", i32 3}
+!11 = !{!"clang version 3.9.0"}
+!12 = !DILocation(line: 2, column: 20, scope: !4)
+!13 = !DILocation(line: 2, column: 13, scope: !4)
+!14 = !DILocation(line: 3, column: 20, scope: !8)
+!15 = !DILocation(line: 3, column: 13, scope: !8)