llvm-6502/test/CodeGen/X86/commute-two-addr.ll
2007-08-15 13:36:28 +00:00

26 lines
626 B
LLVM

; The register allocator can commute two-address instructions to avoid
; insertion of register-register copies.
; Make sure there are only 3 mov's for each testcase
; RUN: llvm-upgrade < %s | llvm-as | llc -march=x86 -x86-asm-syntax=intel | \
; RUN: grep {\\\<mov\\\>} | count 6
target triple = "i686-pc-linux-gnu"
%G = external global int
declare void %ext(int)
int %add_test(int %X, int %Y) {
%Z = add int %X, %Y ;; Last use of Y, but not of X.
store int %Z, int* %G
ret int %X
}
int %xor_test(int %X, int %Y) {
%Z = xor int %X, %Y ;; Last use of Y, but not of X.
store int %Z, int* %G
ret int %X
}