8ebb3eac02
The legacy PM is deprecated, so update a bunch of lit tests running opt to use the new PM syntax when specifying the pipeline. In this patch focus has been put on test cases for ConstantMerge, ConstraintElimination, CorrelatedValuePropagation, GlobalDCE, GlobalOpt, SCCP, TailCallElim and PredicateInfo. Differential Revision: https://reviews.llvm.org/D114516
126 lines
4.9 KiB
LLVM
126 lines
4.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=tailcallelim -verify-dom-info -S | FileCheck %s
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; This test checks that TRE would be done for only one recursive call.
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; The test_multiple_exits function has three recursive calls.
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; First recursive call could not be eliminated because there is
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; escaped pointer to local variable. Second recursive call could
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; be eliminated. Thrid recursive call could not be eliminated since
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; this is not last call. Thus, test checks that TRE would be done
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; for only second recursive call.
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; IR for that test was generated from the following C++ source:
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;
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; void capture_arg (int*);
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; void test_multiple_exits (int param);
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; if (param >= 0 && param < 10) {
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; int temp;
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; capture_arg(&temp);
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; // TRE could not be done because pointer to local
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; // variable "temp" is escaped.
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; test_multiple_exits(param + 1);
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; } else if (param >=10 && param < 20) {
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; // TRE should be done.
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; test_multiple_exits(param + 1);
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; } else if (param >= 20 && param < 22) {
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; // TRE could not be done since recursive
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; // call is not last call.
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; test_multiple_exits(param + 1);
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; func();
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; }
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;
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; return;
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; }
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; Function Attrs: noinline optnone uwtable
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declare void @_Z11capture_argPi(i32* %param) #0
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; Function Attrs: noinline optnone uwtable
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declare void @_Z4funcv() #0
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; Function Attrs: noinline nounwind uwtable
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define dso_local void @_Z19test_multiple_exitsi(i32 %param) local_unnamed_addr #2 {
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; CHECK-LABEL: @_Z19test_multiple_exitsi(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TEMP:%.*]] = alloca i32, align 4
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; CHECK-NEXT: br label [[TAILRECURSE:%.*]]
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; CHECK: tailrecurse:
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; CHECK-NEXT: [[PARAM_TR:%.*]] = phi i32 [ [[PARAM:%.*]], [[ENTRY:%.*]] ], [ [[ADD6:%.*]], [[IF_THEN5:%.*]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[PARAM_TR]], 10
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; CHECK-NEXT: br i1 [[TMP0]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast i32* [[TEMP]] to i8*
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; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull [[TMP1]]) #1
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; CHECK-NEXT: call void @_Z11capture_argPi(i32* nonnull [[TEMP]])
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; CHECK-NEXT: [[ADD:%.*]] = add nuw nsw i32 [[PARAM_TR]], 1
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; CHECK-NEXT: call void @_Z19test_multiple_exitsi(i32 [[ADD]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[TMP1]]) #1
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; CHECK-NEXT: br label [[IF_END14:%.*]]
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; CHECK: if.else:
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; CHECK-NEXT: [[PARAM_OFF:%.*]] = add i32 [[PARAM_TR]], -10
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; CHECK-NEXT: [[TMP2:%.*]] = icmp ult i32 [[PARAM_OFF]], 10
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; CHECK-NEXT: br i1 [[TMP2]], label [[IF_THEN5]], label [[IF_ELSE7:%.*]]
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; CHECK: if.then5:
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; CHECK-NEXT: [[ADD6]] = add nuw nsw i32 [[PARAM_TR]], 1
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; CHECK-NEXT: br label [[TAILRECURSE]]
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; CHECK: if.else7:
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; CHECK-NEXT: [[TMP3:%.*]] = and i32 [[PARAM_TR]], -2
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; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP3]], 20
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; CHECK-NEXT: br i1 [[TMP4]], label [[IF_THEN11:%.*]], label [[IF_END14]]
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; CHECK: if.then11:
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; CHECK-NEXT: [[ADD12:%.*]] = add nsw i32 [[PARAM_TR]], 1
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; CHECK-NEXT: tail call void @_Z19test_multiple_exitsi(i32 [[ADD12]])
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; CHECK-NEXT: tail call void @_Z4funcv()
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; CHECK-NEXT: ret void
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; CHECK: if.end14:
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; CHECK-NEXT: ret void
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;
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entry:
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%temp = alloca i32, align 4
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%0 = icmp ult i32 %param, 10
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br i1 %0, label %if.then, label %if.else
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if.then: ; preds = %entry
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%1 = bitcast i32* %temp to i8*
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call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %1) #2
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call void @_Z11capture_argPi(i32* nonnull %temp)
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%add = add nuw nsw i32 %param, 1
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call void @_Z19test_multiple_exitsi(i32 %add)
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call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %1) #2
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br label %if.end14
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if.else: ; preds = %entry
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%param.off = add i32 %param, -10
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%2 = icmp ult i32 %param.off, 10
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br i1 %2, label %if.then5, label %if.else7
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if.then5: ; preds = %if.else
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%add6 = add nuw nsw i32 %param, 1
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call void @_Z19test_multiple_exitsi(i32 %add6)
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br label %if.end14
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if.else7: ; preds = %if.else
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%3 = and i32 %param, -2
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%4 = icmp eq i32 %3, 20
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br i1 %4, label %if.then11, label %if.end14
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if.then11: ; preds = %if.else7
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%add12 = add nsw i32 %param, 1
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call void @_Z19test_multiple_exitsi(i32 %add12)
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call void @_Z4funcv()
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br label %if.end14
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if.end14: ; preds = %if.then5, %if.then11, %if.else7, %if.then
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ret void
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}
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #2
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #2
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attributes #0 = { nofree noinline norecurse nounwind uwtable }
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attributes #1 = { nounwind uwtable }
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attributes #2 = { argmemonly nounwind willreturn }
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