diff --git a/llvm/test/Transforms/InstCombine/merging-multiple-stores-into-successor.ll b/llvm/test/Transforms/InstCombine/merging-multiple-stores-into-successor.ll new file mode 100644 index 0000000000000..f04897b6fb668 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/merging-multiple-stores-into-successor.ll @@ -0,0 +1,74 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt %s -instcombine -instcombine-infinite-loop-threshold=4 -S | FileCheck %s + +@var_7 = external global i8, align 1 +@var_1 = external global i32, align 4 +@var_0 = external global i16, align 2 +@var_5 = external global i64, align 8 +@arr_2 = external global [0 x i32], align 4 +@arr_4 = external global [0 x i16], align 2 +@arr_3 = external global [8 x i32], align 16 + +define void @_Z4testv() { +; CHECK-LABEL: @_Z4testv( +; CHECK-NEXT: bb: +; CHECK-NEXT: [[I:%.*]] = load i8, i8* @var_7, align 1 +; CHECK-NEXT: [[I1:%.*]] = icmp eq i8 [[I]], -1 +; CHECK-NEXT: [[I4:%.*]] = load i16, i16* @var_0, align 2 +; CHECK-NEXT: [[I8:%.*]] = sext i16 [[I4]] to i32 +; CHECK-NEXT: br i1 [[I1]], label [[BB10:%.*]], label [[BB9:%.*]] +; CHECK: bb9: +; CHECK-NEXT: br label [[BB12:%.*]] +; CHECK: bb10: +; CHECK-NEXT: [[I2:%.*]] = load i32, i32* @var_1, align 4 +; CHECK-NEXT: [[I3:%.*]] = icmp eq i32 [[I2]], 0 +; CHECK-NEXT: [[I6:%.*]] = load i64, i64* @var_5, align 8 +; CHECK-NEXT: [[I5:%.*]] = sext i16 [[I4]] to i64 +; CHECK-NEXT: [[I7:%.*]] = select i1 [[I3]], i64 [[I6]], i64 [[I5]] +; CHECK-NEXT: [[I11:%.*]] = trunc i64 [[I7]] to i32 +; CHECK-NEXT: br label [[BB12]] +; CHECK: bb12: +; CHECK-NEXT: [[STOREMERGE1:%.*]] = phi i32 [ [[I11]], [[BB10]] ], [ 1, [[BB9]] ] +; CHECK-NEXT: [[STOREMERGE:%.*]] = phi i32 [ [[I11]], [[BB10]] ], [ 1, [[BB9]] ] +; CHECK-NEXT: store i32 [[STOREMERGE1]], i32* getelementptr inbounds ([0 x i32], [0 x i32]* @arr_2, i64 0, i64 0), align 4 +; CHECK-NEXT: store i16 [[I4]], i16* getelementptr inbounds ([0 x i16], [0 x i16]* @arr_4, i64 0, i64 0), align 2 +; CHECK-NEXT: store i32 [[I8]], i32* getelementptr inbounds ([8 x i32], [8 x i32]* @arr_3, i64 0, i64 0), align 16 +; CHECK-NEXT: store i32 [[STOREMERGE]], i32* getelementptr inbounds ([0 x i32], [0 x i32]* @arr_2, i64 0, i64 1), align 4 +; CHECK-NEXT: store i16 [[I4]], i16* getelementptr inbounds ([0 x i16], [0 x i16]* @arr_4, i64 0, i64 1), align 2 +; CHECK-NEXT: store i32 [[I8]], i32* getelementptr inbounds ([8 x i32], [8 x i32]* @arr_3, i64 0, i64 1), align 4 +; CHECK-NEXT: ret void +; +bb: + %i = load i8, i8* @var_7, align 1 + %i1 = icmp eq i8 %i, -1 + %i2 = load i32, i32* @var_1, align 4 + %i3 = icmp eq i32 %i2, 0 + %i4 = load i16, i16* @var_0, align 2 + %i5 = sext i16 %i4 to i64 + %i6 = load i64, i64* @var_5, align 8 + %i7 = select i1 %i3, i64 %i6, i64 %i5 + %i8 = sext i16 %i4 to i32 + br i1 %i1, label %bb10, label %bb9 + +bb9: ; preds = %bb + store i32 1, i32* getelementptr inbounds ([0 x i32], [0 x i32]* @arr_2, i64 0, i64 0), align 4 + store i16 %i4, i16* getelementptr inbounds ([0 x i16], [0 x i16]* @arr_4, i64 0, i64 0), align 2 + store i32 %i8, i32* getelementptr inbounds ([8 x i32], [8 x i32]* @arr_3, i64 0, i64 0), align 4 + store i32 1, i32* getelementptr inbounds ([0 x i32], [0 x i32]* @arr_2, i64 0, i64 1), align 4 + store i16 %i4, i16* getelementptr inbounds ([0 x i16], [0 x i16]* @arr_4, i64 0, i64 1), align 2 + store i32 %i8, i32* getelementptr inbounds ([8 x i32], [8 x i32]* @arr_3, i64 0, i64 1), align 4 + br label %bb12 + +bb10: ; preds = %bb + %i11 = trunc i64 %i7 to i32 + store i32 %i11, i32* getelementptr inbounds ([0 x i32], [0 x i32]* @arr_2, i64 0, i64 0), align 4 + store i16 %i4, i16* getelementptr inbounds ([0 x i16], [0 x i16]* @arr_4, i64 0, i64 0), align 2 + store i32 %i8, i32* getelementptr inbounds ([8 x i32], [8 x i32]* @arr_3, i64 0, i64 0), align 4 + store i32 %i11, i32* getelementptr inbounds ([0 x i32], [0 x i32]* @arr_2, i64 0, i64 1), align 4 + store i16 %i4, i16* getelementptr inbounds ([0 x i16], [0 x i16]* @arr_4, i64 0, i64 1), align 2 + store i32 %i8, i32* getelementptr inbounds ([8 x i32], [8 x i32]* @arr_3, i64 0, i64 1), align 4 + br label %bb12 + +bb12: ; preds = %bb10, %bb9 + ret void +}