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af70e5c676
leads to partial-register definitions. To help avoid redundant zero-extensions, also teach the h-register matching patterns that use movzbl to match anyext as well as zext. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80099 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
436 B
LLVM
19 lines
436 B
LLVM
; RUN: llvm-as < %s | llc -march=x86-64 | grep movzbl | count 2
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; Use movzbl to avoid partial-register updates.
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define i32 @foo(i32 %p, i8 zeroext %x) nounwind {
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%q = trunc i32 %p to i8
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%r = udiv i8 %q, %x
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%s = zext i8 %r to i32
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%t = and i32 %s, 1
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ret i32 %t
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}
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define i32 @bar(i32 %p, i16 zeroext %x) nounwind {
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%q = trunc i32 %p to i16
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%r = udiv i16 %q, %x
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%s = zext i16 %r to i32
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%t = and i32 %s, 1
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ret i32 %t
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}
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