mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-07 01:54:50 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135654 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
969 B
LLVM
44 lines
969 B
LLVM
; RUN: opt < %s -loop-reduce -S | FileCheck %s
|
|
;
|
|
; Test LSR's OptimizeShadowIV. Handle a floating-point IV with a
|
|
; nonzero initial value.
|
|
; rdar://9786536
|
|
|
|
; First, make sure LSR doesn't crash on an empty IVUsers list.
|
|
; CHECK: @dummyIV
|
|
; CHECK-NOT: phi
|
|
; CHECK-NOT: sitofp
|
|
; CHECK: br
|
|
define void @dummyIV() nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%i.01 = phi i32 [ -39, %entry ], [ %inc, %loop ]
|
|
%conv = sitofp i32 %i.01 to double
|
|
%inc = add nsw i32 %i.01, 1
|
|
br i1 undef, label %loop, label %for.end
|
|
|
|
for.end:
|
|
unreachable
|
|
}
|
|
|
|
; Now check that the computed double constant is correct.
|
|
; CHECK: @doubleIV
|
|
; CHECK: phi double [ -3.900000e+01, %entry ]
|
|
; CHECK: br
|
|
define void @doubleIV() nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%i.01 = phi i32 [ -39, %entry ], [ %inc, %loop ]
|
|
%conv = sitofp i32 %i.01 to double
|
|
%div = fdiv double %conv, 4.000000e+01
|
|
%inc = add nsw i32 %i.01, 1
|
|
br i1 undef, label %loop, label %for.end
|
|
|
|
for.end:
|
|
unreachable
|
|
}
|