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https://github.com/c64scene-ar/llvm-6502.git
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5be18e8476
instructions. It attempts to create high-level multi-operand GEPs, though in cases where this isn't possible it falls back to casting the pointer to i8* and emitting a GEP with that. Using GEP instructions instead of ptrtoint+arithmetic+inttoptr helps pointer analyses that don't use ScalarEvolution, such as BasicAliasAnalysis. Also, make the AddrModeMatcher more aggressive in handling GEPs. Previously it assumed that operand 0 of a GEP would require a register in almost all cases. It now does extra checking and can do more matching if operand 0 of the GEP is foldable. This fixes a problem that was exposed by SCEVExpander using GEPs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72093 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
1.3 KiB
LLVM
40 lines
1.3 KiB
LLVM
; RUN: llvm-as < %s | opt -indvars | llvm-dis > %t
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; RUN: not grep ptrtoint %t
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; RUN: not grep inttoptr %t
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; RUN: grep getelementptr %t | count 1
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; Indvars shouldn't leave getelementptrs expanded out as
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; inttoptr+ptrtoint in its output in common cases.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.Foo = type { i32, i32, [10 x i32], i32 }
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define void @me(%struct.Foo* nocapture %Bar) nounwind {
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entry:
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br i1 false, label %return, label %bb.nph
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb1, %bb.nph
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%i.01 = phi i64 [ %4, %bb1 ], [ 0, %bb.nph ] ; <i64> [#uses=3]
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%0 = getelementptr %struct.Foo* %Bar, i64 %i.01, i32 2, i64 3 ; <i32*> [#uses=1]
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%1 = load i32* %0, align 4 ; <i32> [#uses=1]
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%2 = mul i32 %1, 113 ; <i32> [#uses=1]
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%3 = getelementptr %struct.Foo* %Bar, i64 %i.01, i32 2, i64 3 ; <i32*> [#uses=1]
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store i32 %2, i32* %3, align 4
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%4 = add i64 %i.01, 1 ; <i64> [#uses=2]
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br label %bb1
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bb1: ; preds = %bb
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%phitmp = icmp sgt i64 %4, 19999 ; <i1> [#uses=1]
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br i1 %phitmp, label %bb1.return_crit_edge, label %bb
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bb1.return_crit_edge: ; preds = %bb1
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br label %return
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return: ; preds = %bb1.return_crit_edge, %entry
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ret void
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}
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