fd46308de4
Before adding a MK_Value READ MemoryAccess, check whether the read is necessary or synthesizable. Synthesizable values are later generated by the SCEVExpander and therefore do not need to be transferred explicitly. This can happen because the check for synthesizability has presumbly been forgotten in the case where a phi's incoming value has been defined in a different statement. Differential Revision: http://reviews.llvm.org/D15687 llvm-svn: 258998
88 lines
3.0 KiB
LLVM
88 lines
3.0 KiB
LLVM
; RUN: opt %loadPolly -S -polly-codegen < %s | FileCheck %s
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;
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; Verify we initialize the scalar locations reserved for the incoming phi
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; values.
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;
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; CHECK: polly.start:
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; CHECK-NEXT: store float %ebig.0, float* %ebig.0.s2a
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; CHECK-NEXT: br label %polly.stmt.if.end.entry
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;
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; int g(void);
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; float M;
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; int max(float *restrict xbig, int eres, int bres, float *restrict indx) {
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; int i, iebig;
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; float ebig;
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; for (i = 0; i < 4 + eres; i++) {
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; if (g())
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; break;
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;
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; if (xbig[i] > ebig) {
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; ebig = xbig[i];
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; iebig = (int)(indx[i] + bres);
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; }
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; }
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; return (iebig);
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; }
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;
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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@M = common global float 0.000000e+00, align 4
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define i32 @max(float* noalias %xbig, i32 %eres, i32 %bres, float* noalias %indx) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%iebig.0 = phi i32 [ undef, %entry ], [ %iebig.1, %for.inc ]
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%ebig.0 = phi float [ undef, %entry ], [ %ebig.1, %for.inc ]
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%add = add nsw i32 %eres, 4
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%tmp = sext i32 %add to i64
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%cmp = icmp slt i64 %indvars.iv, %tmp
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br i1 %cmp, label %for.body, label %for.end.loopexit
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for.body: ; preds = %for.cond
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%call = call i32 @g() #2
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%tobool = icmp eq i32 %call, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %for.body
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%iebig.0.lcssa1 = phi i32 [ %iebig.0, %for.body ]
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br label %for.end
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if.end: ; preds = %for.body
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%arrayidx = getelementptr inbounds float, float* %xbig, i64 %indvars.iv
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%tmp3 = load float, float* %arrayidx, align 4
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%cmp1 = fcmp ogt float %tmp3, %ebig.0
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br i1 %cmp1, label %if.then.2, label %if.end.9
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if.then.2: ; preds = %if.end
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%arrayidx4 = getelementptr inbounds float, float* %xbig, i64 %indvars.iv
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%tmp4 = load float, float* %arrayidx4, align 4
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%arrayidx6 = getelementptr inbounds float, float* %indx, i64 %indvars.iv
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%tmp5 = load float, float* %arrayidx6, align 4
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%conv = sitofp i32 %bres to float
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%add7 = fadd float %tmp5, %conv
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%conv8 = fptosi float %add7 to i32
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br label %if.end.9
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if.end.9: ; preds = %if.then.2, %if.end
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%iebig.1 = phi i32 [ %conv8, %if.then.2 ], [ %iebig.0, %if.end ]
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%ebig.1 = phi float [ %tmp4, %if.then.2 ], [ %ebig.0, %if.end ]
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br label %for.inc
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for.inc: ; preds = %if.end.9
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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br label %for.cond
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for.end.loopexit: ; preds = %for.cond
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%iebig.0.lcssa = phi i32 [ %iebig.0, %for.cond ]
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %if.then
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%iebig.02 = phi i32 [ %iebig.0.lcssa, %for.end.loopexit ], [ %iebig.0.lcssa1, %if.then ]
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ret i32 %iebig.02
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}
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declare i32 @g() #1
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