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https://github.com/c64scene-ar/llvm-6502.git
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278f958c61
induction variable value and a loop-variant value, don't force the insert position to be at the post-increment position, because it may not be dominated by the loop-variant value. This fixes a use-before-def problem noticed on PPC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96774 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
LLVM
; RUN: llc < %s -print-lsr-output |& FileCheck %s
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; The icmp is a post-inc use, and the increment is in %bb11, but the
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; scevgep needs to be inserted in %bb so that it is dominated by %t.
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; CHECK: %t = load i8** undef
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; CHECK: %scevgep = getelementptr i8* %t, i32 %lsr.iv.next
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; CHECK: %c1 = icmp ult i8* %scevgep, undef
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target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128-n32"
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target triple = "powerpc-apple-darwin9"
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define void @foo() nounwind {
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entry:
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br label %bb11
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bb11:
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%i = phi i32 [ 0, %entry ], [ %i.next, %bb ] ; <i32> [#uses=3]
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%ii = shl i32 %i, 2 ; <i32> [#uses=1]
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%c0 = icmp eq i32 %i, undef ; <i1> [#uses=1]
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br i1 %c0, label %bb13, label %bb
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bb:
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%t = load i8** undef, align 16 ; <i8*> [#uses=1]
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%p = getelementptr i8* %t, i32 %ii ; <i8*> [#uses=1]
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%c1 = icmp ult i8* %p, undef ; <i1> [#uses=1]
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%i.next = add i32 %i, 1 ; <i32> [#uses=1]
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br i1 %c1, label %bb11, label %bb13
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bb13:
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unreachable
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}
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