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https://github.com/c64scene-ar/llvm-6502.git
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David Majnemer
bcca616029
We neglected to check if the first index made the GEP ineligible for 'inbounds'. This fixes PR23753. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239015 91177308-0d34-0410-b5e6-96231b3b80d8
30 lines
973 B
LLVM
30 lines
973 B
LLVM
; RUN: opt < %s -loop-reduce -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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@a = external global i32, align 4
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@d = external global i8, align 1
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; CHECK-LABEL: void @f
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define void @f() {
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* @a, i64 %indvars.iv
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%cmp = icmp ne i32* %arrayidx, bitcast (i8* @d to i32*)
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%indvars.iv.next = add i64 %indvars.iv, 1
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br i1 %cmp, label %for.body, label %for.end
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; CHECK: %[[phi:.*]] = phi i8* [ %[[gep:.*]], {{.*}} ], [ getelementptr (i8, i8* @d, i64 sub (i64 4, i64 ptrtoint (i32* @a to i64))), {{.*}} ]
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; CHECK-NEXT: %[[gep]] = getelementptr i8, i8* %[[phi]], i64 -4
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; CHECK-NEXT: %[[cst:.*]] = bitcast i8* %[[gep]] to i32*
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; CHECK-NEXT: %[[cmp:.*]] = icmp ne i32* %[[cst]], null
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; CHECK-NEXT: br i1 %[[cmp]]
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for.end:
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ret void
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}
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