loop-strength-reduce-2.ll
1.68 KB
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; RUN: llc < %s -mtriple=i686-- -relocation-model=pic | FileCheck %s -check-prefix=PIC
; RUN: llc < %s -mtriple=i686-- -relocation-model=static | FileCheck %s -check-prefix=STATIC
;
; Make sure the common loop invariant A is hoisted up to preheader,
; since too many registers are needed to subsume it into the addressing modes.
; It's safe to sink A in when it's not pic.
; PIC: align
; PIC: movl $4, -4([[REG:%e[a-z]+]])
; PIC: movl $5, ([[REG]])
; PIC: addl $4, [[REG]]
; PIC: decl {{%e[[a-z]+}}
; PIC: jne
; STATIC: align
; STATIC: movl $4, -4(%ecx)
; STATIC: movl $5, (%ecx)
; STATIC: addl $4, %ecx
; STATIC: decl %eax
; STATIC: jne
@A = global [16 x [16 x i32]] zeroinitializer, align 32 ; <[16 x [16 x i32]]*> [#uses=2]
define void @test(i32 %row, i32 %N.in) nounwind {
entry:
%N = bitcast i32 %N.in to i32 ; <i32> [#uses=1]
%tmp5 = icmp sgt i32 %N.in, 0 ; <i1> [#uses=1]
br i1 %tmp5, label %cond_true, label %return
cond_true: ; preds = %cond_true, %entry
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2]
%i.0.0 = bitcast i32 %indvar to i32 ; <i32> [#uses=2]
%tmp2 = add i32 %i.0.0, 1 ; <i32> [#uses=1]
%tmp = getelementptr [16 x [16 x i32]], [16 x [16 x i32]]* @A, i32 0, i32 %row, i32 %tmp2 ; <i32*> [#uses=1]
store i32 4, i32* %tmp
%tmp5.upgrd.1 = add i32 %i.0.0, 2 ; <i32> [#uses=1]
%tmp7 = getelementptr [16 x [16 x i32]], [16 x [16 x i32]]* @A, i32 0, i32 %row, i32 %tmp5.upgrd.1 ; <i32*> [#uses=1]
store i32 5, i32* %tmp7
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %cond_true
return: ; preds = %cond_true, %entry
ret void
}