43 lines
1.7 KiB
LLVM
43 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
|
|
; RUN: opt -p loop-idiom -S %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"
|
|
|
|
define void @test_simplify_scev_during_expansion_flags(i64 %start) {
|
|
; CHECK-LABEL: define void @test_simplify_scev_during_expansion_flags(
|
|
; CHECK-SAME: i64 [[START:%.*]]) {
|
|
; CHECK-NEXT: [[ENTRY:.*]]:
|
|
; CHECK-NEXT: [[START_NEG:%.*]] = sub i64 0, [[START]]
|
|
; CHECK-NEXT: [[START_MUL:%.*]] = ashr exact i64 [[START_NEG]], 2
|
|
; CHECK-NEXT: [[TMP0:%.*]] = shl nsw i64 [[START_MUL]], 2
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i64 404, [[TMP0]]
|
|
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 null, i8 0, i64 [[TMP1]], i1 false)
|
|
; CHECK-NEXT: br label %[[LOOP:.*]]
|
|
; CHECK: [[LOOP]]:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[START_MUL]], %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
|
|
; CHECK-NEXT: [[PTR_IV:%.*]] = phi ptr [ null, %[[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], %[[LOOP]] ]
|
|
; CHECK-NEXT: [[PTR_IV_NEXT]] = getelementptr i8, ptr [[PTR_IV]], i64 4
|
|
; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
|
|
; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV]], 100
|
|
; CHECK-NEXT: br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP]]
|
|
; CHECK: [[EXIT]]:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
%start.neg = sub i64 0, %start
|
|
%start.mul = ashr exact i64 %start.neg, 2
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i64 [ %start.mul, %entry ], [ %iv.next, %loop ]
|
|
%ptr.iv = phi ptr [ null, %entry ], [ %ptr.iv.next, %loop ]
|
|
store i32 0, ptr %ptr.iv, align 4
|
|
%ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 4
|
|
%iv.next = add i64 %iv, 1
|
|
%ec = icmp eq i64 %iv, 100
|
|
br i1 %ec, label %exit, label %loop
|
|
|
|
exit:
|
|
ret void
|
|
}
|