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
|
|
|
|
define void @fold_add_zext_to_sext(ptr %dst, i1 %start) {
|
|
; CHECK-LABEL: define void @fold_add_zext_to_sext(
|
|
; CHECK-SAME: ptr [[DST:%.*]], i1 [[START:%.*]]) {
|
|
; CHECK-NEXT: [[ENTRY:.*]]:
|
|
; CHECK-NEXT: [[START_EXT:%.*]] = zext i1 [[START]] to i32
|
|
; CHECK-NEXT: [[TMP0:%.*]] = zext i1 [[START]] to i64
|
|
; CHECK-NEXT: [[TMP1:%.*]] = shl nuw nsw i64 [[TMP0]], 2
|
|
; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[DST]], i64 [[TMP1]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = sub i32 25, [[START_EXT]]
|
|
; CHECK-NEXT: [[TMP3:%.*]] = zext nneg i32 [[TMP2]] to i64
|
|
; CHECK-NEXT: [[TMP4:%.*]] = shl nuw nsw i64 [[TMP3]], 2
|
|
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[SCEVGEP]], i8 0, i64 [[TMP4]], i1 false)
|
|
; CHECK-NEXT: br label %[[LOOP:.*]]
|
|
; CHECK: [[LOOP]]:
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[START_EXT]], %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
|
|
; CHECK-NEXT: [[IV_EXT:%.*]] = zext i32 [[IV]] to i64
|
|
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[DST]], i64 [[IV_EXT]]
|
|
; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
|
|
; CHECK-NEXT: [[EC:%.*]] = icmp ult i32 [[IV]], 24
|
|
; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
|
|
; CHECK: [[EXIT]]:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
%start.ext = zext i1 %start to i32
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ %start.ext, %entry ], [ %iv.next, %loop ]
|
|
%iv.ext = zext i32 %iv to i64
|
|
%gep = getelementptr i32, ptr %dst, i64 %iv.ext
|
|
store i32 0, ptr %gep, align 4
|
|
%iv.next = add i32 %iv, 1
|
|
%ec = icmp ult i32 %iv, 24
|
|
br i1 %ec, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|