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b7b3e8e261
Record internal state based on register units. This is often more efficient as there are typically fewer register units to update compared to iterating over all the aliases of a register. Original patch by Matthias Braun, but I've been rebasing and fixing it for almost 2 years and fixed a few bugs causing intermediate failures to make this patch independent of the changes in https://reviews.llvm.org/D52010.
27 lines
914 B
LLVM
27 lines
914 B
LLVM
; RUN: llc -mtriple=x86_64-linux-gnu -O0 %s -o - | FileCheck %s
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; CHECK: patatino:
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; CHECK: .cfi_startproc
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; CHECK: movzwl (%rax), %e[[REG0:[abcd]x]]
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; CHECK: movq %r[[REG0]], ({{%r[abcd]x}})
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; CHECK: retq
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define void @patatino() {
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%tmp = load i16, i16* undef, align 8
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%conv18098 = sext i16 %tmp to i64
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%and1 = and i64 %conv18098, -1
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%cmp = icmp ult i64 -1, undef
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%conv = sext i1 %cmp to i64
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%load1 = load i48, i48* undef, align 8
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%bf.cast18158 = sext i48 %load1 to i64
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%conv18159 = trunc i64 %bf.cast18158 to i32
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%conv18160 = sext i32 %conv18159 to i64
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%div18162 = udiv i64 %conv, %conv18160
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%and18163 = and i64 %conv18098, %div18162
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%shr18164 = lshr i64 %and1, %and18163
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%conv18165 = trunc i64 %shr18164 to i16
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%conv18166 = zext i16 %conv18165 to i64
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store i64 %conv18166, i64* undef, align 8
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store i48 undef, i48* undef, align 8
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ret void
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}
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