llvm-6502/test/CodeGen/X86/peep-test-1.ll
Dan Gohman 4bfcf2a2a6 Fix the "test" optimization to recognize "dec" as an add of
negative one, as subtracts of immediates are canonicalized
to adds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66180 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-05 19:32:48 +00:00

24 lines
573 B
LLVM

; RUN: llvm-as < %s | llc -march=x86 > %t
; RUN: grep dec %t | count 1
; RUN: not grep test %t
; RUN: not grep cmp %t
define void @foo(i32 %n, double* nocapture %p) nounwind {
br label %bb
bb:
%indvar = phi i32 [ 0, %0 ], [ %indvar.next, %bb ]
%i.03 = sub i32 %n, %indvar
%1 = getelementptr double* %p, i32 %i.03
%2 = load double* %1, align 4
%3 = mul double %2, 2.930000e+00
store double %3, double* %1, align 4
%4 = add i32 %i.03, -1
%phitmp = icmp slt i32 %4, 0
%indvar.next = add i32 %indvar, 1
br i1 %phitmp, label %bb, label %return
return:
ret void
}