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45f934c834
64-bit, 32-bit and 16-bit move-immediate instructions are 7, 6, and 5 bytes, respectively, whereas and/or with 8-bit immediate is only three bytes. Since these instructions imply an additional memory read (which the CPU could elide, but we don't think it does), restrict these patterns to minsize functions. Differential Revision: http://reviews.llvm.org/D18374 llvm-svn: 264440
89 lines
1.4 KiB
LLVM
89 lines
1.4 KiB
LLVM
; RUN: llc -mtriple=i686-unknown-linux-gnu %s -o - | FileCheck %s --check-prefix=CHECK32 --check-prefix=CHECK
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu %s -o - | FileCheck %s --check-prefix=CHECK64 --check-prefix=CHECK
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define void @zero_optsize(i32* %p) optsize {
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entry:
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store i32 0, i32* %p
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ret void
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; CHECK-LABEL: zero_optsize:
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; CHECK: movl $0
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; CHECK: ret
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}
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define void @minus_one_optsize(i32* %p) optsize {
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entry:
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store i32 -1, i32* %p
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ret void
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; CHECK-LABEL: minus_one_optsize:
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; CHECK: movl $-1
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; CHECK: ret
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}
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define void @zero_64(i64* %p) minsize {
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entry:
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store i64 0, i64* %p
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ret void
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; CHECK-LABEL: zero_64:
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; CHECK32: andl $0
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; CHECK32: andl $0
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; CHECK64: andq $0
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; CHECK: ret
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}
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define void @zero_32(i32* %p) minsize {
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entry:
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store i32 0, i32* %p
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ret void
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; CHECK-LABEL: zero_32:
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; CHECK: andl $0
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; CHECK: ret
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}
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define void @zero_16(i16* %p) minsize {
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entry:
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store i16 0, i16* %p
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ret void
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; CHECK-LABEL: zero_16:
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; CHECK: andw $0
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; CHECK: ret
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}
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define void @minus_one_64(i64* %p) minsize {
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entry:
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store i64 -1, i64* %p
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ret void
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; CHECK-LABEL: minus_one_64:
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; CHECK32: orl $-1
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; CHECK32: orl $-1
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; CHECK64: orq $-1
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; CHECK: ret
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}
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define void @minus_one_32(i32* %p) minsize {
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entry:
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store i32 -1, i32* %p
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ret void
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; CHECK-LABEL: minus_one_32:
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; CHECK: orl $-1
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; CHECK: ret
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}
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define void @minus_one_16(i16* %p) minsize {
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entry:
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store i16 -1, i16* %p
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ret void
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; CHECK-LABEL: minus_one_16:
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; CHECK: orw $-1
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; CHECK: ret
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}
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