8848c1e3c7
The testcase in PR33077 generates a LSR Use Formula with two SCEVAddRecExprs for the same loop. Such uncommon formula will become non-canonical after GenerateTruncates adds sign extension to the ScaledReg of the Formula, and it will break the assertion that every Formula to be inserted is canonical. The fix is to call canonicalize for the raw Formula generated by GenerateTruncates before inserting it. llvm-svn: 303361
37 lines
1.3 KiB
LLVM
37 lines
1.3 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -mtriple=x86_64-unknown-linux-gnu -loop-reduce -S < %s
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; PR33077. Check the LSR Use formula to be inserted is already canonicalized and
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; will not trigger assertion.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; Function Attrs: uwtable
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define void @foo() {
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cHeapLvb.exit:
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br label %not_zero48.us
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not_zero48.us: ; preds = %not_zero48.us, %cHeapLvb.exit
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%indvars.iv.us = phi i64 [ %indvars.iv.next.us.7, %not_zero48.us ], [ undef, %cHeapLvb.exit ]
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%0 = phi i32 [ %13, %not_zero48.us ], [ undef, %cHeapLvb.exit ]
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%indvars.iv.next.us = add nuw nsw i64 %indvars.iv.us, 1
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%1 = add i32 %0, 2
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%2 = getelementptr inbounds i32, i32 addrspace(1)* undef, i64 %indvars.iv.next.us
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%3 = load i32, i32 addrspace(1)* %2, align 4
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%4 = add i32 %0, 3
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%5 = load i32, i32 addrspace(1)* undef, align 4
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%6 = sub i32 undef, %5
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%factor.us.2 = shl i32 %6, 1
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%7 = add i32 %factor.us.2, %1
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%8 = load i32, i32 addrspace(1)* undef, align 4
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%9 = sub i32 %7, %8
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%factor.us.3 = shl i32 %9, 1
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%10 = add i32 %factor.us.3, %4
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%11 = load i32, i32 addrspace(1)* undef, align 4
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%12 = sub i32 %10, %11
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%factor.us.4 = shl i32 %12, 1
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%13 = add i32 %0, 8
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%indvars.iv.next.us.7 = add nsw i64 %indvars.iv.us, 8
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br label %not_zero48.us
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}
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