d391e4fe84
Be more consistent in the naming convention for the various RET instructions to specify in terms of bitwidth. Helps prevent future scheduler model mismatches like those that were only addressed in D44687. Differential Revision: https://reviews.llvm.org/D113302
161 lines
7.3 KiB
YAML
161 lines
7.3 KiB
YAML
# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
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# RUN: -experimental-debug-variable-locations \
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# RUN: -run-pass=phi-node-elimination,simple-register-coalescing \
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# RUN: | FileCheck %s --check-prefix=DOESCOALESCE
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# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
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# RUN: -experimental-debug-variable-locations \
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# RUN: -run-pass=phi-node-elimination,simple-register-coalescing,livedebugvars,greedy,virtregrewriter \
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# RUN: | FileCheck %s --check-prefix=CHECK
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#
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# Test that a PHI with a debug instruction number attached survives register
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# coalescing, when its vreg gets coalesced. This test comes in two parts, first
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# that coalescing actually happens, second that a DBG_PHI is still produced
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# afterwards.
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#
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# Original C code, the PHI is of the value of 'bar' after the control flow.
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# Compiled at -O0, applied -mem2reg, llc -O0, then manually added the PHI
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# instruction label. Additional variable locations removed.
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#
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# void ext(long);
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# long getlong(void);
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# int foo(long bar, long baz) {
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# ext(bar);
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# bar += 12;
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# ext(bar);
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#
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# if (getlong())
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# bar += 1;
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#
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# bar += baz;
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# ext(bar);
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# return bar;
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# }
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#
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--- |
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; ModuleID = 'promoted.ll'
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source_filename = "test.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i64 %bar, metadata !12, metadata !DIExpression()), !dbg !13
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call void @llvm.dbg.value(metadata i64 %baz, metadata !14, metadata !DIExpression()), !dbg !13
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call void @ext(i64 %bar), !dbg !13
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%add = add nsw i64 %bar, 12, !dbg !13
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call void @llvm.dbg.value(metadata i64 %add, metadata !12, metadata !DIExpression()), !dbg !13
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call void @ext(i64 %add), !dbg !13
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%call = call i64 @getlong(), !dbg !13
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%tobool = icmp ne i64 %call, 0, !dbg !13
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br i1 %tobool, label %if.then, label %if.end, !dbg !13
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if.then: ; preds = %entry
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%add1 = add nsw i64 %add, 1, !dbg !13
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call void @llvm.dbg.value(metadata i64 %add1, metadata !12, metadata !DIExpression()), !dbg !13
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br label %if.end, !dbg !13
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if.end: ; preds = %if.then, %entry
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%bar.addr.0 = phi i64 [ %add1, %if.then ], [ %add, %entry ], !dbg !13
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call void @llvm.dbg.value(metadata i64 %bar.addr.0, metadata !12, metadata !DIExpression()), !dbg !13
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%add2 = add nsw i64 %bar.addr.0, %baz, !dbg !13
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call void @llvm.dbg.value(metadata i64 %add2, metadata !12, metadata !DIExpression()), !dbg !13
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call void @ext(i64 %add2), !dbg !13
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%conv = trunc i64 %add2 to i32, !dbg !13
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ret i32 %conv, !dbg !13
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare dso_local void @ext(i64)
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declare dso_local i64 @getlong()
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!""}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !11, !11}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
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!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
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!15 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
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...
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---
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name: foo
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alignment: 16
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tracksRegLiveness: true
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liveins:
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- { reg: '$rdi', virtual-reg: '%3' }
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- { reg: '$rsi', virtual-reg: '%5' }
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frameInfo:
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maxAlignment: 1
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hasCalls: true
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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liveins: $rdi, $rsi
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%5:gr64 = COPY $rsi
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%3:gr64 = COPY $rdi
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%4:gr64 = COPY killed %3
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%6:gr64 = COPY killed %5
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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$rdi = COPY %4, debug-location !13
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CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !13
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ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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%9:gr64 = ADD64ri32 %4, 12, implicit-def $eflags, debug-location !13
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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$rdi = COPY %9, debug-location !13
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CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !13
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ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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CALL64pcrel32 @getlong, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax, debug-location !13
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ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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%8:gr64 = COPY $rax, debug-location !13
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CMP64ri8 %8, 0, implicit-def $eflags, debug-location !13
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JCC_1 %bb.2, 4, implicit $eflags, debug-location !13
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; DOESCOALESCE-LABEL: bb.1.if.then:
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; CHECK-LABEL: bb.1.if.then:
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bb.1.if.then:
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%10:gr64 = ADD64ri32 %9, 1, implicit-def $eflags, debug-location !13
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; Verify that the vreg is different immediately after register coalescing.
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; DOESCOALESCE-NOT: %10:gr64 ADD64ri32
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; DOESCOALESCE: %{{[0-9]+}}:gr64 = ADD64ri32
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; Verify that all these registers land in rbx.
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; CHECK: renamable $rbx = ADD64ri32 killed renamable $rbx
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; DOESCOALESCE-LABEL: bb.2.if.end:
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; CHECK-LABEL: bb.2.if.end:
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bb.2.if.end:
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%2:gr64 = PHI %9, %bb.0, %10, %bb.1, debug-instr-number 1, debug-location !13
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; CHECK: DBG_PHI $rbx, 1
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DBG_INSTR_REF 1, 0, !12, !DIExpression(), debug-location !13
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%14:gr64 = ADD64rr killed %2, %6, implicit-def $eflags, debug-location !13
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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$rdi = COPY %14, debug-location !13
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CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !13
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ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !13
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%13:gr32 = COPY %14.sub_32bit, debug-location !13
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$eax = COPY %13, debug-location !13
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RET64 implicit $eax, debug-location !13
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...
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