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54 lines
2.5 KiB
LLVM
54 lines
2.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -gvn < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; The load in the loop can not bypass the data from the previous loop. The store above it in the loop aliases.
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define void @foo() {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A:%.*]] = alloca [3 x i32], align 4
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.cond.cleanup:
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; CHECK-NEXT: ret void
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 1, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[P_017:%.*]] = phi i32* [ undef, [[ENTRY]] ], [ [[ARRAYIDX3:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = add nsw i64 [[INDVARS_IV]], -1
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [3 x i32], [3 x i32]* [[A]], i64 0, i64 [[TMP0]]
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; CHECK-NEXT: store i32 50, i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[P_017]], align 4
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; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP1]] to i32
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; CHECK-NEXT: [[ADD1:%.*]] = add nsw i32 [[TMP2]], [[TMP3]]
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; CHECK-NEXT: [[ARRAYIDX3]] = getelementptr inbounds [3 x i32], [3 x i32]* [[A]], i64 0, i64 [[INDVARS_IV]]
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; CHECK-NEXT: store i32 60, i32* [[ARRAYIDX3]], align 4
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], 3
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP:%.*]]
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;
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entry:
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%a = alloca [3 x i32], align 4
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
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%p.017 = phi i32* [ undef, %entry ], [ %arrayidx3, %for.body ]
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%0 = add nsw i64 %indvars.iv, -1
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%arrayidx = getelementptr inbounds [3 x i32], [3 x i32]* %a, i64 0, i64 %0
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store i32 50, i32* %arrayidx, align 4
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%1 = shl i64 %indvars.iv, 1
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%2 = load i32, i32* %p.017, align 4
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%3 = trunc i64 %1 to i32
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%add1 = add nsw i32 %2, %3
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%arrayidx3 = getelementptr inbounds [3 x i32], [3 x i32]* %a, i64 0, i64 %indvars.iv
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store i32 60, i32* %arrayidx3, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 3
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br i1 %exitcond, label %for.body, label %for.cond.cleanup
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}
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