8a36594a7e
If one of the operands of a binary operator is a constant range, we can use ConstantRange::binaryOp to approximate the result. We still handle single element constant ranges as we did previously, with ConstantExpr::get(), because ConstantRange::binaryOp still gives worse results in a few cases for single element ranges. Also note that we bail out early if any of the operands is still unknown. Reviewers: davide, efriedma, mssimpso Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D71936
22 lines
936 B
LLVM
22 lines
936 B
LLVM
; RUN: opt -sccp -S < %s | FileCheck %s
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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-f80:128:128-n8:16:32-S128"
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; FIXME: Add back support for handling special values of vector/fp types.
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; CHECK: store volatile <2 x i64> %and.i119.i, <2 x i64>* %p
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; rdar://11324230
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define void @foo(<2 x i64>* %p) nounwind {
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entry:
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br label %while.body.i
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while.body.i: ; preds = %while.body.i, %entry
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%vWorkExponent.i.033 = phi <4 x i32> [ %sub.i.i, %while.body.i ], [ <i32 939524096, i32 939524096, i32 939524096, i32 939524096>, %entry ]
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%sub.i.i = add <4 x i32> %vWorkExponent.i.033, <i32 -8388608, i32 -8388608, i32 -8388608, i32 -8388608>
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%0 = bitcast <4 x i32> %sub.i.i to <2 x i64>
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%and.i119.i = and <2 x i64> %0, zeroinitializer
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store volatile <2 x i64> %and.i119.i, <2 x i64>* %p
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br label %while.body.i
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}
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