mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-10 22:55:57 +00:00
cab9cf01ce
if indvars happens to optimize away the unused primary induction variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70333 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
692 B
LLVM
19 lines
692 B
LLVM
; RUN: llvm-as < %s | opt -indvars | llvm-dis | %prcontext Loop: 1 | grep %indvar
|
|
|
|
; The indvar simplification code should ensure that the first PHI in the block
|
|
; is the canonical one!
|
|
|
|
define i32 @test() {
|
|
; <label>:0
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%NonIndvar = phi i32 [ 200, %0 ], [ %NonIndvarNext, %Loop ] ; <i32> [#uses=1]
|
|
%Canonical = phi i32 [ 0, %0 ], [ %CanonicalNext, %Loop ] ; <i32> [#uses=2]
|
|
store i32 %Canonical, i32* null
|
|
%NonIndvarNext = sdiv i32 %NonIndvar, 2 ; <i32> [#uses=1]
|
|
%CanonicalNext = add i32 %Canonical, 1 ; <i32> [#uses=1]
|
|
br label %Loop
|
|
}
|
|
|