reuse-cast.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -loop-idiom -S %s | FileCheck %s
define void @reuse_cast_1(float** %ptr, i1 %c) {
; CHECK-LABEL: @reuse_cast_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_0:%.*]]
; CHECK: loop.0:
; CHECK-NEXT: [[TMP:%.*]] = load float*, float** [[PTR:%.*]], align 8
; CHECK-NEXT: [[TMP2:%.*]] = bitcast float* [[TMP]] to i8*
; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP_2_PREHEADER:%.*]], label [[LOOP_1_PREHEADER:%.*]]
; CHECK: loop.1.preheader:
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 4 [[TMP2]], i8 0, i64 400, i1 false)
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.2.preheader:
; CHECK-NEXT: br label [[LOOP_2:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: [[IV_1:%.*]] = phi i64 [ [[IV_1_NEXT:%.*]], [[LOOP_1]] ], [ 0, [[LOOP_1_PREHEADER]] ]
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds float, float* [[TMP]], i64 [[IV_1]]
; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i64 [[IV_1]], 1
; CHECK-NEXT: [[C_1:%.*]] = icmp ne i64 [[IV_1_NEXT]], 100
; CHECK-NEXT: br i1 [[C_1]], label [[LOOP_1]], label [[LOOP_0_LATCH_LOOPEXIT1:%.*]]
; CHECK: loop.2:
; CHECK-NEXT: [[IV_2:%.*]] = phi i64 [ [[IV_2_NEXT:%.*]], [[LOOP_2]] ], [ 0, [[LOOP_2_PREHEADER]] ]
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds float, float* [[TMP]], i64 [[IV_2]]
; CHECK-NEXT: store float 0.000000e+00, float* [[TMP10]], align 4
; CHECK-NEXT: [[TMP11:%.*]] = load float*, float** [[PTR]], align 8
; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds float, float* [[TMP11]], i64 [[IV_2]]
; CHECK-NEXT: [[TMP13:%.*]] = load float, float* [[TMP12]], align 4
; CHECK-NEXT: [[IV_2_NEXT]] = add nuw nsw i64 [[IV_2]], 1
; CHECK-NEXT: [[C_2:%.*]] = icmp ne i64 [[IV_2_NEXT]], 100
; CHECK-NEXT: br i1 [[C_2]], label [[LOOP_2]], label [[LOOP_0_LATCH_LOOPEXIT:%.*]]
; CHECK: loop.0.latch.loopexit:
; CHECK-NEXT: br label [[LOOP_0_LATCH:%.*]]
; CHECK: loop.0.latch.loopexit1:
; CHECK-NEXT: br label [[LOOP_0_LATCH]]
; CHECK: loop.0.latch:
; CHECK-NEXT: [[C_0:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[C_0]], label [[LOOP_0]], label [[END:%.*]]
; CHECK: end:
; CHECK-NEXT: ret void
;
entry:
br label %loop.0
loop.0: ; preds = %loop.0.latch, %entry
%tmp = load float*, float** %ptr, align 8
br i1 %c, label %loop.2, label %loop.1
loop.1: ; preds = %loop.1, %loop.0
%iv.1 = phi i64 [ %iv.1.next, %loop.1 ], [ 0, %loop.0 ]
%tmp4 = getelementptr inbounds float, float* %tmp, i64 %iv.1
store float 0.000000e+00, float* %tmp4, align 4
%iv.1.next = add nuw nsw i64 %iv.1, 1
%c.1 = icmp ne i64 %iv.1.next, 100
br i1 %c.1, label %loop.1, label %loop.0.latch
loop.2: ; preds = %loop.2, %loop.0
%iv.2 = phi i64 [ %iv.2.next, %loop.2 ], [ 0, %loop.0 ]
%tmp10 = getelementptr inbounds float, float* %tmp, i64 %iv.2
store float 0.000000e+00, float* %tmp10, align 4
%tmp11 = load float*, float** %ptr, align 8
%tmp12 = getelementptr inbounds float, float* %tmp11, i64 %iv.2
%tmp13 = load float, float* %tmp12, align 4
%iv.2.next = add nuw nsw i64 %iv.2, 1
%c.2 = icmp ne i64 %iv.2.next, 100
br i1 %c.2, label %loop.2, label %loop.0.latch
loop.0.latch: ; preds = %loop.2, %loop.1
%c.0 = call i1 @cond()
br i1 %c.0, label %loop.0, label %end
end: ; preds = %loop.0.latch
ret void
}
declare i1 @cond()
declare void @use.i8(i8*)
declare void @use.i1(i1)
define void @reuse_cast_2(i32 %x, i32* %ptr.1.start) {
; CHECK-LABEL: @reuse_cast_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[PTR_1_START2:%.*]] = bitcast i32* [[PTR_1_START:%.*]] to i8*
; CHECK-NEXT: [[STACK:%.*]] = alloca [2 x i32], align 4
; CHECK-NEXT: [[STACK1:%.*]] = bitcast [2 x i32]* [[STACK]] to i8*
; CHECK-NEXT: [[C_0:%.*]] = icmp sgt i32 [[X:%.*]], 0
; CHECK-NEXT: [[CAST_TO_REUSE:%.*]] = bitcast [2 x i32]* [[STACK]] to i8*
; CHECK-NEXT: [[PTR_2_START:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[STACK]], i64 0, i64 0
; CHECK-NEXT: call void @use.i8(i8* [[CAST_TO_REUSE]])
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[STACK1]], i8* align 4 [[PTR_1_START2]], i64 8, i1 false)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[PTR_1:%.*]] = phi i32* [ [[PTR_1_START]], [[ENTRY]] ], [ [[PTR_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[PTR_2:%.*]] = phi i32* [ [[PTR_2_START]], [[ENTRY]] ], [ [[PTR_2_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[PTR_1_NEXT]] = getelementptr inbounds i32, i32* [[PTR_1]], i64 1
; CHECK-NEXT: [[LV:%.*]] = load i32, i32* [[PTR_1]], align 4
; CHECK-NEXT: [[PTR_2_NEXT]] = getelementptr inbounds i32, i32* [[PTR_2]], i64 1
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT: [[C_1:%.*]] = icmp eq i32 [[IV]], 0
; CHECK-NEXT: br i1 [[C_1]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: call void @use.i1(i1 [[C_0]])
; CHECK-NEXT: ret void
;
entry:
%stack = alloca [2 x i32], align 4
%c.0 = icmp sgt i32 %x, 0
%cast.to.reuse = bitcast [2 x i32]* %stack to i8*
%ptr.2.start = getelementptr inbounds [2 x i32], [2 x i32]* %stack, i64 0, i64 0
call void @use.i8(i8* %cast.to.reuse)
br label %loop
loop: ; preds = %loop, %entry
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%ptr.1 = phi i32* [ %ptr.1.start, %entry ], [ %ptr.1.next, %loop ]
%ptr.2 = phi i32* [ %ptr.2.start, %entry ], [ %ptr.2.next, %loop ]
%ptr.1.next = getelementptr inbounds i32, i32* %ptr.1, i64 1
%lv = load i32, i32* %ptr.1, align 4
%ptr.2.next = getelementptr inbounds i32, i32* %ptr.2, i64 1
store i32 %lv, i32* %ptr.2, align 4
%iv.next = add nuw nsw i32 %iv, 1
%c.1 = icmp eq i32 %iv, 0
br i1 %c.1, label %loop, label %exit
exit: ; preds = %loop
call void @use.i1(i1 %c.0)
ret void
}