forked from OSchip/llvm-project
28 lines
906 B
LLVM
28 lines
906 B
LLVM
; RUN: opt -S -unroll-runtime -loop-unroll < %s | FileCheck %s
|
|
|
|
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
|
|
|
|
;; Check that we don't emit expensive instructions to compute trip
|
|
;; counts when unrolling loops.
|
|
|
|
define i32 @test(i64 %v12, i8* %array, i64* %loc) {
|
|
; CHECK-LABEL: @test(
|
|
; CHECK-NOT: udiv
|
|
entry:
|
|
%step = load i64, i64* %loc, !range !0
|
|
br label %loop
|
|
|
|
loop: ; preds = %entry, %loop
|
|
%k.015 = phi i64 [ %v15, %loop ], [ %v12, %entry ]
|
|
%v14 = getelementptr inbounds i8, i8* %array, i64 %k.015
|
|
store i8 0, i8* %v14
|
|
%v15 = add nuw nsw i64 %k.015, %step
|
|
%v16 = icmp slt i64 %v15, 8193
|
|
br i1 %v16, label %loop, label %loopexit
|
|
|
|
loopexit: ; preds = %loop
|
|
ret i32 0
|
|
}
|
|
|
|
!0 = !{i64 1, i64 100}
|