42 lines
1.6 KiB
LLVM
42 lines
1.6 KiB
LLVM
; RUN: opt -S < %s -loop-unroll -unroll-count=4 | FileCheck %s
|
|
;
|
|
; Test induction variable simplify after loop unrolling. It should
|
|
; expose nice opportunities for GVN.
|
|
;
|
|
; CHECK-NOT: while.body also ensures that loop unrolling (with SCEV)
|
|
; removes unrolled loop exits given that 128 is a multiple of 4.
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
|
|
|
|
; PR10534: LoopUnroll not keeping canonical induction variable...
|
|
; CHECK: while.body:
|
|
; CHECK-NOT: while.body.1:
|
|
; CHECK: %shr.1 = lshr i32 %bit_addr.addr.01, 5
|
|
; CHECK: %arrayidx.1 = getelementptr inbounds i32* %bitmap, i32 %shr.1
|
|
; CHECK: %shr.2 = lshr i32 %bit_addr.addr.01, 5
|
|
; CHECK: %arrayidx.2 = getelementptr inbounds i32* %bitmap, i32 %shr.2
|
|
; CHECK: %shr.3 = lshr i32 %bit_addr.addr.01, 5
|
|
; CHECK: %arrayidx.3 = getelementptr inbounds i32* %bitmap, i32 %shr.3
|
|
define void @FlipBit(i32* nocapture %bitmap, i32 %bit_addr, i32 %nbits) nounwind {
|
|
entry:
|
|
br label %while.body
|
|
|
|
while.body:
|
|
%nbits.addr.02 = phi i32 [ 128, %entry ], [ %dec, %while.body ]
|
|
%bit_addr.addr.01 = phi i32 [ 0, %entry ], [ %inc, %while.body ]
|
|
%dec = add i32 %nbits.addr.02, -1
|
|
%shr = lshr i32 %bit_addr.addr.01, 5
|
|
%rem = and i32 %bit_addr.addr.01, 31
|
|
%shl = shl i32 1, %rem
|
|
%arrayidx = getelementptr inbounds i32* %bitmap, i32 %shr
|
|
%tmp6 = load i32* %arrayidx, align 4
|
|
%xor = xor i32 %tmp6, %shl
|
|
store i32 %xor, i32* %arrayidx, align 4
|
|
%inc = add i32 %bit_addr.addr.01, 1
|
|
%tobool = icmp eq i32 %dec, 0
|
|
br i1 %tobool, label %while.end, label %while.body
|
|
|
|
while.end:
|
|
ret void
|
|
}
|