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264ac878b2
This happens when GVN widens loads. Part of PR6627. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130405 91177308-0d34-0410-b5e6-96231b3b80d8
30 lines
710 B
LLVM
30 lines
710 B
LLVM
; RUN: opt -S -instcombine < %s | FileCheck %s
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define i1 @test1(i16* %x) {
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%load = load i16* %x, align 4
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%trunc = trunc i16 %load to i8
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%cmp1 = icmp eq i8 %trunc, 127
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%and = and i16 %load, -256
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%cmp2 = icmp eq i16 %and, 17664
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%or = and i1 %cmp1, %cmp2
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ret i1 %or
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; CHECK: @test1
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; CHECK-NEXT: load i16
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; CHECK-NEXT: icmp eq i16 %load, 17791
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; CHECK-NEXT: ret i1
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}
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define i1 @test2(i16* %x) {
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%load = load i16* %x, align 4
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%and = and i16 %load, -256
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%cmp1 = icmp eq i16 %and, 32512
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%trunc = trunc i16 %load to i8
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%cmp2 = icmp eq i8 %trunc, 69
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%or = and i1 %cmp1, %cmp2
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ret i1 %or
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; CHECK: @test2
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; CHECK-NEXT: load i16
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; CHECK-NEXT: icmp eq i16 %load, 32581
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; CHECK-NEXT: ret i1
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}
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