| # Check that the backend can produce a load-and-trap instruction also in |
| # the presence of a DEBUG_VALUE machine instruction. |
| # |
| # RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=zEC12 -start-before=postrapseudos \ |
| # RUN: -o - 2>&1 | FileCheck %s |
| # |
| # CHECK: lat |
| |
| --- | |
| |
| define i32 @f1(i32* %ptr) #1 { |
| entry: |
| %val = load i32, i32* %ptr |
| ; Keep the dbg metadata live by referencing it in the IR. |
| call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !7, metadata !DIExpression()), !dbg !9 |
| %cmp = icmp eq i32 %val, 0 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| tail call void @llvm.trap() |
| unreachable |
| |
| if.end: ; preds = %entry |
| ret i32 %val |
| } |
| |
| declare void @llvm.trap() #0 |
| declare void @llvm.dbg.value(metadata, i64, metadata, metadata) |
| |
| declare void @llvm.stackprotector(i8*, i8**) #2 |
| |
| attributes #0 = { cold noreturn nounwind "target-cpu"="zEC12" } |
| attributes #1 = { "target-cpu"="zEC12" } |
| attributes #2 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "llvm", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "test.ll", directory: "/tmp") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = distinct !DISubprogram(name: "test_dbg_value", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !6 = !DISubroutineType(types: !2) |
| !7 = !DILocalVariable(name: "in", arg: 1, scope: !5, file: !1, line: 1, type: !8) |
| !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !9 = !DILocation(line: 1, column: 1, scope: !5) |
| |
| ... |
| --- |
| name: f1 |
| alignment: 16 |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$r2d' } |
| frameInfo: |
| maxCallFrameSize: 0 |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x00000001), %bb.2(0x7fffffff) |
| liveins: $r2d |
| |
| renamable $r2l = LMux killed renamable $r2d, 0, $noreg :: (load (s32) from %ir.ptr) |
| DBG_VALUE $noreg, $r2l, !7, !DIExpression(), debug-location !9 |
| CHIMux renamable $r2l, 0, implicit-def $cc |
| DBG_VALUE $noreg, $r2l, !7, !DIExpression(), debug-location !9 |
| BRC 14, 6, %bb.2, implicit killed $cc |
| |
| bb.1.if.then: |
| successors: |
| |
| Trap |
| |
| bb.2.if.end: |
| liveins: $r2l |
| |
| Return implicit $r2l |
| |
| ... |