; RUN: llc < %s -stop-after=virtregrewriter -o - | FileCheck %s
;
; NVPTX produces a different order of the BBs
; XFAIL: target=nvptx{{.*}}
; Both RISC-V and AMDGPU(GCN) deploy two VirtRegRewriter in their codegen
; pipeline. This test prematurely stops at the first one, which doesn't cleanup
; the virtual register map and cause an assertion failure. Ideally we can solve
; this by teaching `-stop-after` how to stop at the last instance of a Pass,
; but we're just marking XFAIL for these two targets for now.
; XFAIL: target=riscv{{.*}}
; XFAIL: target=amdgcn-{{.*}}
; Generated with "clang++ -g -O1 -S -emit-llvm"
;
; inline bool bar(char c) {
; return c >= '0' && c <= '9';
; }
;
; unsigned foo(const char* data,
; int length,
; int* parsing_result) {
; unsigned value = 0;
; int result = 1;
; bool overflow = 0;
;
; while (bar(*data)) {
; if (value > 1) {
; result = 2;
; overflow = 1;
; }
;
; if (!overflow)
; value = value + 1;
; }
;
; if (length == 0 || value) {
; if (!overflow)
; result = 0;
; } else {
; result = 1;
; }
; bye:
; *parsing_result = result;
; return result == 0 ? value : 0;
; }
;
; CHECK: {{^body:}}
; CHECK: bye.thread21:
; CHECK: DBG_LABEL !14
; CHECK: if.then5:
; CHECK: DBG_LABEL !14
; CHECK-NOT: DBG_LABEL !14
$_Z3barc = comdat any
; Function Attrs: nounwind uwtable
define dso_local i32 @_Z3fooPKciPi(ptr nocapture readonly %data, i32 %length, ptr nocapture %parsing_result) local_unnamed_addr !dbg !4 {
entry:
%0 = load i8, ptr %data, align 1
%call23 = tail call zeroext i1 @_Z3barc(i8 signext %0), !dbg !15
br i1 %call23, label %while.body, label %while.end
while.body: ; preds = %entry, %while.body
%overflow.026 = phi i8 [ %spec.select18, %while.body ], [ 0, %entry ]
%result.025 = phi i32 [ %spec.select, %while.body ], [ 1, %entry ]
%value.024 = phi i32 [ %value.1, %while.body ], [ 0, %entry ]
%cmp = icmp ugt i32 %value.024, 1
%spec.select = select i1 %cmp, i32 2, i32 %result.025
%spec.select18 = select i1 %cmp, i8 1, i8 %overflow.026
%1 = and i8 %spec.select18, 1
%2 = xor i8 %1, 1
%3 = zext i8 %2 to i32
%value.1 = add i32 %value.024, %3
%4 = load i8, ptr %data, align 1
%call = tail call zeroext i1 @_Z3barc(i8 signext %4), !dbg !15
br i1 %call, label %while.body, label %while.end.loopexit
while.end.loopexit: ; preds = %while.body
%phitmp = and i8 %spec.select18, 1
br label %while.end
while.end: ; preds = %while.end.loopexit, %entry
%value.0.lcssa = phi i32 [ 0, %entry ], [ %value.1, %while.end.loopexit ]
%result.0.lcssa = phi i32 [ 1, %entry ], [ %spec.select, %while.end.loopexit ]
%overflow.0.lcssa = phi i8 [ 0, %entry ], [ %phitmp, %while.end.loopexit ]
%cmp3 = icmp eq i32 %length, 0
%tobool4 = icmp ne i32 %value.0.lcssa, 0
%or.cond = or i1 %cmp3, %tobool4
br i1 %or.cond, label %if.then5, label %bye.thread21
bye.thread21: ; preds = %while.end
call void @llvm.dbg.label(metadata !14), !dbg !16
store i32 1, ptr %parsing_result, align 4
br label %6
if.then5: ; preds = %while.end
%tobool6 = icmp eq i8 %overflow.0.lcssa, 0
call void @llvm.dbg.label(metadata !14), !dbg !16
call void @llvm.dbg.label(metadata !14), !dbg !16
br i1 %tobool6, label %bye.thread, label %bye
bye.thread: ; preds = %if.then5
store i32 0, ptr %parsing_result, align 4
br label %5
bye: ; preds = %if.then5
store i32 %result.0.lcssa, ptr %parsing_result, align 4
%cmp10 = icmp eq i32 %result.0.lcssa, 0
br i1 %cmp10, label %5, label %6
; <label>:5: ; preds = %bye.thread, %bye
br label %6
; <label>:6: ; preds = %bye.thread21, %bye, %5
%7 = phi i32 [ %value.0.lcssa, %5 ], [ 0, %bye ], [ 0, %bye.thread21 ]
ret i32 %7
}
; Function Attrs: inlinehint nounwind uwtable
define linkonce_odr dso_local zeroext i1 @_Z3barc(i8 signext %c) local_unnamed_addr comdat {
entry:
%c.off = add i8 %c, -48
%0 = icmp ult i8 %c.off, 10
ret i1 %0
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.label(metadata) #0
attributes #0 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
!1 = !DIFile(filename: "live-debug-label.cc", directory: ".")
!2 = !{}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooPKciPi", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !13)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !8, !11, !12}
!7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
!9 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !10)
!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
!13 = !{!14}
!14 = !DILabel(scope: !4, name: "bye", file: !1, line: 28)
!15 = !DILocation(line: 12, column: 10, scope: !4)
!16 = !DILocation(line: 28, column: 1, scope: !4)
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