133 lines
4.8 KiB
LLVM
133 lines
4.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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;
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; Exercise folding of memcmp calls with addition expressions involving
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; pointers into constant arrays of types larger than char and fractional
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; offsets.
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declare i32 @memcmp(ptr, ptr, i64)
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@i32a = constant [2 x i16] [i16 4386, i16 13124]
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@i32b = constant [2 x i16] [i16 4386, i16 13124]
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define void @fold_memcmp_i32a_i32b_pIb(i32 %I, ptr %pcmp)
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; CHECK-LABEL: @fold_memcmp_i32a_i32b_pIb(
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; CHECK-NEXT: store i32 0, ptr [[PCMP:%.*]], align 4
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; CHECK-NEXT: [[PST_1_1_2:%.*]] = getelementptr i32, ptr [[PCMP]], i64 1
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; CHECK-NEXT: store i32 0, ptr [[PST_1_1_2]], align 4
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; CHECK-NEXT: [[PST_1_1_3:%.*]] = getelementptr i32, ptr [[PCMP]], i64 2
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; CHECK-NEXT: store i32 0, ptr [[PST_1_1_3]], align 4
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; CHECK-NEXT: ret void
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;
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{
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%pi8ap1 = getelementptr i8, ptr @i32a, i32 1
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%pi8bp1 = getelementptr i8, ptr @i32b, i32 1
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%cmp_1_1_1 = call i32 @memcmp(ptr %pi8ap1, ptr %pi8ap1, i64 1)
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store i32 %cmp_1_1_1, ptr %pcmp
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%pst_1_1_2 = getelementptr i32, ptr %pcmp, i32 1
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%cmp_1_1_2 = call i32 @memcmp(ptr %pi8ap1, ptr %pi8ap1, i64 2)
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store i32 %cmp_1_1_2, ptr %pst_1_1_2
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%pst_1_1_3 = getelementptr i32, ptr %pcmp, i32 2
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%cmp_1_1_3 = call i32 @memcmp(ptr %pi8ap1, ptr %pi8ap1, i64 3)
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store i32 %cmp_1_1_3, ptr %pst_1_1_3
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ret void
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}
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%struct.A = type { [4 x i8] }
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%struct.B = type { [2 x i8], [2 x i8] }
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@a = constant [1 x %struct.A] [%struct.A { [4 x i8] [i8 1, i8 2, i8 3, i8 4] }]
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@b = constant [1 x %struct.B] [%struct.B { [2 x i8] [i8 1, i8 2], [2 x i8] [i8 3, i8 4]}]
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define void @fold_memcmp_A_B_pIb(i32 %I, ptr %pcmp) {
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; CHECK-LABEL: @fold_memcmp_A_B_pIb(
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; CHECK-NEXT: store i32 0, ptr [[PCMP:%.*]], align 4
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; CHECK-NEXT: [[PST_0_0_2:%.*]] = getelementptr i32, ptr [[PCMP]], i64 1
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; CHECK-NEXT: store i32 0, ptr [[PST_0_0_2]], align 4
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; CHECK-NEXT: [[PST_0_0_3:%.*]] = getelementptr i32, ptr [[PCMP]], i64 2
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; CHECK-NEXT: store i32 0, ptr [[PST_0_0_3]], align 4
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; CHECK-NEXT: [[PST_0_0_4:%.*]] = getelementptr i32, ptr [[PCMP]], i64 3
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; CHECK-NEXT: store i32 0, ptr [[PST_0_0_4]], align 4
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; CHECK-NEXT: [[PST_0_1_1:%.*]] = getelementptr i32, ptr [[PCMP]], i64 4
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; CHECK-NEXT: store i32 -1, ptr [[PST_0_1_1]], align 4
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; CHECK-NEXT: [[PST_0_1_2:%.*]] = getelementptr i32, ptr [[PCMP]], i64 5
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; CHECK-NEXT: store i32 -1, ptr [[PST_0_1_2]], align 4
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; CHECK-NEXT: [[PST_0_1_3:%.*]] = getelementptr i32, ptr [[PCMP]], i64 6
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; CHECK-NEXT: store i32 -1, ptr [[PST_0_1_3]], align 4
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; CHECK-NEXT: [[PST_1_0_1:%.*]] = getelementptr i32, ptr [[PCMP]], i64 4
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; CHECK-NEXT: store i32 1, ptr [[PST_1_0_1]], align 4
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; CHECK-NEXT: [[PST_1_0_2:%.*]] = getelementptr i32, ptr [[PCMP]], i64 5
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; CHECK-NEXT: store i32 1, ptr [[PST_1_0_2]], align 4
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; CHECK-NEXT: [[PST_1_0_3:%.*]] = getelementptr i32, ptr [[PCMP]], i64 6
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; CHECK-NEXT: store i32 1, ptr [[PST_1_0_3]], align 4
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; CHECK-NEXT: ret void
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;
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; Fold memcmp(&a, &b, 1) to 0;
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%cmp_0_0_1 = call i32 @memcmp(ptr @a, ptr @b, i64 1)
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store i32 %cmp_0_0_1, ptr %pcmp
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; Fold memcmp(&a, &b, 2) to 0;
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%pst_0_0_2 = getelementptr i32, ptr %pcmp, i32 1
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%cmp_0_0_2 = call i32 @memcmp(ptr @a, ptr @b, i64 2)
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store i32 %cmp_0_0_2, ptr %pst_0_0_2
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; Fold memcmp(&a, &b, 3) to 0;
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%pst_0_0_3 = getelementptr i32, ptr %pcmp, i32 2
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%cmp_0_0_3 = call i32 @memcmp(ptr @a, ptr @b, i64 3)
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store i32 %cmp_0_0_3, ptr %pst_0_0_3
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; Fold memcmp(&a, &b, 4) to 0;
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%pst_0_0_4 = getelementptr i32, ptr %pcmp, i32 3
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%cmp_0_0_4 = call i32 @memcmp(ptr @a, ptr @b, i64 4)
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store i32 %cmp_0_0_4, ptr %pst_0_0_4
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%pi8bp1 = getelementptr i8, ptr @b, i32 1
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; Fold memcmp(&a, (char*)&b + 1, 1) to -1;
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%pst_0_1_1 = getelementptr i32, ptr %pcmp, i32 4
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%cmp_0_1_1 = call i32 @memcmp(ptr @a, ptr %pi8bp1, i64 1)
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store i32 %cmp_0_1_1, ptr %pst_0_1_1
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; Fold memcmp(&a, (char*)&b + 1, 2) to -1;
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%pst_0_1_2 = getelementptr i32, ptr %pcmp, i32 5
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%cmp_0_1_2 = call i32 @memcmp(ptr @a, ptr %pi8bp1, i64 2)
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store i32 %cmp_0_1_2, ptr %pst_0_1_2
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; Fold memcmp(&a, (char*)&b + 1, 3) to -1;
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%pst_0_1_3 = getelementptr i32, ptr %pcmp, i32 6
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%cmp_0_1_3 = call i32 @memcmp(ptr @a, ptr %pi8bp1, i64 3)
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store i32 %cmp_0_1_3, ptr %pst_0_1_3
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%pi8ap1 = getelementptr i8, ptr @a, i32 1
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; Fold memcmp((char*)&a + 1, &b, 1) to +1;
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%pst_1_0_1 = getelementptr i32, ptr %pcmp, i32 4
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%cmp_1_0_1 = call i32 @memcmp(ptr %pi8ap1, ptr @b, i64 1)
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store i32 %cmp_1_0_1, ptr %pst_1_0_1
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; Fold memcmp((char*)&a + 1, &b, 2) to +1;
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%pst_1_0_2 = getelementptr i32, ptr %pcmp, i32 5
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%cmp_1_0_2 = call i32 @memcmp(ptr %pi8ap1, ptr @b, i64 2)
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store i32 %cmp_1_0_2, ptr %pst_1_0_2
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; Fold memcmp((char*)&a + 1, &b, 3) to +1;
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%pst_1_0_3 = getelementptr i32, ptr %pcmp, i32 6
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%cmp_1_0_3 = call i32 @memcmp(ptr %pi8ap1, ptr @b, i64 3)
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store i32 %cmp_1_0_3, ptr %pst_1_0_3
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ret void
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}
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