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26 lines
618 B
LLVM
26 lines
618 B
LLVM
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; RUN: llc < %s -march=x86 | FileCheck %s -check-prefix=X32
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; RUN: llc < %s -march=x86-64 | FileCheck %s -check-prefix=X64
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; The immediate can be encoded in a smaller way if the
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; instruction is a sub instead of an add.
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define i32 @test1(i32 inreg %a) nounwind {
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%b = add i32 %a, 128
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ret i32 %b
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; X32: subl $-128, %eax
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; X64: subl $-128,
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}
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define i64 @test2(i64 inreg %a) nounwind {
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%b = add i64 %a, 2147483648
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ret i64 %b
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; X32: addl $-2147483648, %eax
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; X64: subq $-2147483648,
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}
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define i64 @test3(i64 inreg %a) nounwind {
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%b = add i64 %a, 128
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ret i64 %b
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; X32: addl $128, %eax
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; X64: subq $-128,
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}
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