derek.holloway
7502bf64a4
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68 lines
2.5 KiB
LLVM
68 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=licm -S < %s | FileCheck %s
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;; C reproducer:
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;; void f(int *ptr, int n) {
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;; for (int i = 0; i < n; ++i) {
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;; int x = *ptr;
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;; if (x)
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;; break;
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;;
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;; *ptr = x + 1;
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;; }
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;; }
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define dso_local void @f(ptr nocapture %ptr, i32 %n) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP7:%.*]] = icmp slt i32 0, [[N:%.*]]
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; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_LR_PH:%.*]], label [[CLEANUP1:%.*]]
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; CHECK: for.body.lr.ph:
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; CHECK-NEXT: [[PTR_PROMOTED:%.*]] = load i32, ptr [[PTR:%.*]], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[PTR_PROMOTED]], [[FOR_BODY_LR_PH]] ], [ 1, [[IF_END:%.*]] ]
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; CHECK-NEXT: [[I_08:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH]] ], [ [[INC:%.*]], [[IF_END]] ]
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; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i32 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[TOBOOL_NOT]], label [[IF_END]], label [[FOR_BODY_CLEANUP1_CRIT_EDGE:%.*]]
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; CHECK: if.end:
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; CHECK-NEXT: store i32 1, ptr [[PTR]], align 4
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_08]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP1_CRIT_EDGE:%.*]]
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; CHECK: for.body.cleanup1_crit_edge:
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; CHECK-NEXT: br label [[CLEANUP1]]
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; CHECK: for.cond.cleanup1_crit_edge:
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; CHECK-NEXT: br label [[CLEANUP1]]
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; CHECK: cleanup1:
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; CHECK-NEXT: ret void
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;
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entry:
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%cmp7 = icmp slt i32 0, %n
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br i1 %cmp7, label %for.body.lr.ph, label %cleanup1
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for.body.lr.ph: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.lr.ph, %if.end
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%i.08 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %if.end ]
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%0 = load i32, ptr %ptr, align 4
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%tobool.not = icmp eq i32 %0, 0
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br i1 %tobool.not, label %if.end, label %for.body.cleanup1_crit_edge
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if.end: ; preds = %for.body
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store i32 1, ptr %ptr, align 4
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%inc = add nuw nsw i32 %i.08, 1
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%cmp = icmp slt i32 %inc, %n
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br i1 %cmp, label %for.body, label %for.cond.cleanup1_crit_edge
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for.body.cleanup1_crit_edge: ; preds = %for.body
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br label %cleanup1
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for.cond.cleanup1_crit_edge: ; preds = %if.end
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br label %cleanup1
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cleanup1: ; preds = %for.cond.cleanup1_crit_edge, %for.body.cleanup1_crit_edge, %entry
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ret void
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}
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