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8b944d39b3
e.g. orl $65536, 8(%rax) => orb $1, 10(%rax) Since narrowing is not always a win, e.g. i32 -> i16 is a loss on x86, dag combiner consults with the target before performing the optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72507 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
909 B
LLVM
24 lines
909 B
LLVM
; RUN: llvm-as < %s | llc -march=x86-64 | grep orb | count 1
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; RUN: llvm-as < %s | llc -march=x86-64 | grep orb | grep 1
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; RUN: llvm-as < %s | llc -march=x86-64 | grep orl | count 1
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; RUN: llvm-as < %s | llc -march=x86-64 | grep orl | grep 16842752
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%struct.bf = type { i64, i16, i16, i32 }
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@bfi = common global %struct.bf zeroinitializer, align 16
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define void @t1() nounwind optsize ssp {
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entry:
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%0 = load i32* bitcast (i16* getelementptr (%struct.bf* @bfi, i32 0, i32 1) to i32*), align 8
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%1 = or i32 %0, 65536
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store i32 %1, i32* bitcast (i16* getelementptr (%struct.bf* @bfi, i32 0, i32 1) to i32*), align 8
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ret void
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}
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define void @t2() nounwind optsize ssp {
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entry:
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%0 = load i32* bitcast (i16* getelementptr (%struct.bf* @bfi, i32 0, i32 1) to i32*), align 8
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%1 = or i32 %0, 16842752
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store i32 %1, i32* bitcast (i16* getelementptr (%struct.bf* @bfi, i32 0, i32 1) to i32*), align 8
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ret void
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}
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