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19cfa09971
This reverts commit 329aeb5db43f5e69df038fb20d2def77fe6f8595, and relands commit 61f006ac655431bd44b9e089f74c73bec0c1a48c. This is a continuation of D89456. As it was suggested there, now that SCEV models `PtrToInt`, we can try to improve SCEV's pointer handling. In particular, i believe, i will need this in the future to further fix `SCEVAddExpr`operation type handling. This removes special handling of `ConstantPointerNull` from `ScalarEvolution::createSCEV()`, and add constant folding into `ScalarEvolution::getPtrToIntExpr()`. This way, `null` constants stay as such in SCEV's, but gracefully become zero integers when asked. Reviewed By: Meinersbur Differential Revision: https://reviews.llvm.org/D98147
35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -verify-machineinstrs\
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; RUN: -mcpu=pwr9 --ppc-enable-pipeliner -debug-only=pipeliner 2>&1 \
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; RUN: >/dev/null | FileCheck %s
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define dso_local void @sha512() #0 {
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;CHECK: prolog:
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;CHECK: %18:g8rc = ADD8 %24:g8rc, %23:g8rc
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;CHECK: epilog:
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;CHECK: %28:g8rc_and_g8rc_nox0 = PHI %6:g8rc_and_g8rc_nox0, %bb.3, %22:g8rc_and_g8rc_nox0, %bb.4
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;CHECK-NEXT: %29:g8rc = PHI %12:g8rc, %bb.3, %16:g8rc, %bb.4
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;CHECK-NEXT: %30:g8rc = PHI %15:g8rc, %bb.3, %19:g8rc, %bb.4
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br label %1
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1: ; preds = %1, %0
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%2 = phi i64 [ 0, %0 ], [ %12, %1 ]
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%3 = phi i64 [ undef, %0 ], [ %11, %1 ]
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%4 = phi i64 [ undef, %0 ], [ %3, %1 ]
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%5 = getelementptr inbounds [80 x i64], [80 x i64]* null, i64 0, i64 %2
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%6 = load i64, i64* %5, align 8
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%7 = add i64 0, %6
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%8 = and i64 %3, %4
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%9 = or i64 0, %8
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%10 = add i64 0, %9
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%11 = add i64 %10, %7
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%12 = add nuw nsw i64 %2, 1
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%13 = icmp eq i64 %12, 80
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br i1 %13, label %14, label %1
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14: ; preds = %1
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%15 = add i64 %4, 0
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store i64 %15, i64* undef, align 8
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ret void
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}
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