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a4f530a18c
Most importantly, this keeps constant hoisting from preventing instruction selections ability to turn an AND with 0xffffffff into a move into a 32-bit subregister. llvm-svn: 249370
20 lines
519 B
LLVM
20 lines
519 B
LLVM
; RUN: llc < %s -O3 -march=x86-64 |FileCheck %s
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define i64 @foo(i1 %z, i64 %data1, i64 %data2)
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{
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; If constant 4294967294 is hoisted to a variable, then we won't be able to use
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; the implicit zero extension of 32-bit operations to handle the AND.
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entry:
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%val1 = and i64 %data1, 4294967294
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br i1 %z, label %End, label %L_val2
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; CHECK: andl $-2, {{.*}}
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; CHECK: andl $-2, {{.*}}
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L_val2:
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%val2 = and i64 %data2, 4294967294
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br label %End
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End:
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%p1 = phi i64 [%val1,%entry], [%val2,%L_val2]
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ret i64 %p1
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}
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