776700d0b7
In case some code -- not guarded by control flow -- would be emitted directly in the start block, it may happen that this code would use uninitalized scalar values if the scalar initialization is only emitted at the end of the start block. This is not a problem today in normal Polly, as all statements are emitted in their own basic blocks, but Polly-ACC emits host-to-device copy statements into the start block. Additional Polly-ACC test coverage will be added in subsequent changes that improve the handling of PHI nodes in Polly-ACC. llvm-svn: 278124
69 lines
2.3 KiB
LLVM
69 lines
2.3 KiB
LLVM
; RUN: opt %loadPolly -S -polly-codegen < %s | FileCheck %s
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;
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; float f(float *A, int N) {
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; float tmp = 0;
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; for (int i = 0; i < N; i++)
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; tmp += A[i];
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; }
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;
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; CHECK: bb:
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; CHECK-NOT: %tmp7{{[.*]}} = alloca float
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; CHECK-DAG: %tmp.0.s2a = alloca float
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; CHECK-NOT: %tmp7{{[.*]}} = alloca float
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; CHECK-DAG: %tmp.0.phiops = alloca float
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; CHECK-NOT: %tmp7{{[.*]}} = alloca float
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; CHECK-LABEL: exit:
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; CHECK-NEXT: ret
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; CHECK-LABEL: polly.start:
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; CHECK-NEXT: store float 0.000000e+00, float* %tmp.0.phiops
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; CHECK-NEXT: sext
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; CHECK-LABEL: polly.exiting:
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; CHECK-NEXT: br label %polly.merge_new_and_old
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R1:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R1]], float* %tmp.0.s2a
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; CHECK-LABEL: polly.stmt.bb4:
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; CHECK: %tmp.0.s2a.reload[[R3:[0-9]*]] = load float, float* %tmp.0.s2a
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; CHECK: %tmp[[R5:[0-9]*]]_p_scalar_ = load float, float* %scevgep, align 4, !alias.scope !0, !noalias !2
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; CHECK: %p_tmp[[R4:[0-9]*]] = fadd float %tmp.0.s2a.reload[[R3]], %tmp[[R5]]_p_scalar_
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; CHECK: store float %p_tmp[[R4]], float* %tmp.0.phiops
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R2:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R2]], float* %tmp.0.s2a
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define void @f(float* %A, i32 %N) {
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bb:
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%tmp = sext i32 %N to i64
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br label %bb1
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bb1: ; preds = %bb4, %bb
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%indvars.iv = phi i64 [ %indvars.iv.next, %bb4 ], [ 0, %bb ]
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%tmp.0 = phi float [ 0.000000e+00, %bb ], [ %tmp7, %bb4 ]
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%tmp2 = icmp slt i64 %indvars.iv, %tmp
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br i1 %tmp2, label %bb3, label %bb8
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bb3: ; preds = %bb1
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br label %bb4
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bb4: ; preds = %bb3
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%tmp5 = getelementptr inbounds float, float* %A, i64 %indvars.iv
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%tmp6 = load float, float* %tmp5, align 4
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%tmp7 = fadd float %tmp.0, %tmp6
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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br label %bb1
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bb8: ; preds = %bb1
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br label %exit
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exit:
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ret void
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}
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