| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| ; |
| ; Exercise folding of strncmp calls with constant arrays and nonconstant |
| ; sizes. |
| |
| declare i32 @strncmp(i8*, i8*, i64) |
| |
| @ax = external constant [8 x i8] |
| @a01230123 = constant [8 x i8] c"01230123" |
| @b01230123 = constant [8 x i8] c"01230123" |
| @c01230129 = constant [8 x i8] c"01230129" |
| @d9123_12 = constant [7 x i8] c"9123\0012" |
| @e9123_34 = constant [7 x i8] c"9123\0034" |
| |
| |
| ; Exercise strncmp(A, B, N) folding of arrays with the same bytes. |
| |
| define void @fold_strncmp_a_b_n(i32* %pcmp, i64 %n) { |
| ; CHECK-LABEL: @fold_strncmp_a_b_n( |
| ; CHECK-NEXT: store i32 0, i32* [[PCMP:%.*]], align 4 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i64 [[N:%.*]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = sext i1 [[TMP1]] to i32 |
| ; CHECK-NEXT: [[S0_1:%.*]] = getelementptr i32, i32* [[PCMP]], i64 1 |
| ; CHECK-NEXT: store i32 [[TMP2]], i32* [[S0_1]], align 4 |
| ; CHECK-NEXT: [[TMP3:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i1 [[TMP3]] to i32 |
| ; CHECK-NEXT: [[S0_2:%.*]] = getelementptr i32, i32* [[PCMP]], i64 2 |
| ; CHECK-NEXT: store i32 [[TMP4]], i32* [[S0_2]], align 4 |
| ; CHECK-NEXT: [[TMP5:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP6:%.*]] = sext i1 [[TMP5]] to i32 |
| ; CHECK-NEXT: [[S0_3:%.*]] = getelementptr i32, i32* [[PCMP]], i64 3 |
| ; CHECK-NEXT: store i32 [[TMP6]], i32* [[S0_3]], align 4 |
| ; CHECK-NEXT: [[S0_4:%.*]] = getelementptr i32, i32* [[PCMP]], i64 4 |
| ; CHECK-NEXT: store i32 0, i32* [[S0_4]], align 4 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP8:%.*]] = sext i1 [[TMP7]] to i32 |
| ; CHECK-NEXT: [[S0_5:%.*]] = getelementptr i32, i32* [[PCMP]], i64 5 |
| ; CHECK-NEXT: store i32 [[TMP8]], i32* [[S0_5]], align 4 |
| ; CHECK-NEXT: [[TMP9:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP10:%.*]] = zext i1 [[TMP9]] to i32 |
| ; CHECK-NEXT: [[S5_0:%.*]] = getelementptr i32, i32* [[PCMP]], i64 6 |
| ; CHECK-NEXT: store i32 [[TMP10]], i32* [[S5_0]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| |
| %p0 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 0 |
| |
| %q0 = getelementptr [8 x i8], [8 x i8]* @b01230123, i64 0, i64 0 |
| %q1 = getelementptr [8 x i8], [8 x i8]* @b01230123, i64 0, i64 1 |
| %q2 = getelementptr [8 x i8], [8 x i8]* @b01230123, i64 0, i64 2 |
| %q3 = getelementptr [8 x i8], [8 x i8]* @b01230123, i64 0, i64 3 |
| %q4 = getelementptr [8 x i8], [8 x i8]* @b01230123, i64 0, i64 4 |
| %q5 = getelementptr [8 x i8], [8 x i8]* @b01230123, i64 0, i64 5 |
| |
| ; Fold strncmp(a, b, n) to 0. |
| %c0_0 = call i32 @strncmp(i8* %p0, i8* %q0, i64 %n) |
| %s0_0 = getelementptr i32, i32* %pcmp, i64 0 |
| store i32 %c0_0, i32* %s0_0 |
| |
| ; Fold strncmp(a, b + 1, n) to N != 0 ? -1 : 0. |
| %c0_1 = call i32 @strncmp(i8* %p0, i8* %q1, i64 %n) |
| %s0_1 = getelementptr i32, i32* %pcmp, i64 1 |
| store i32 %c0_1, i32* %s0_1 |
| |
| ; Fold strncmp(a, b + 2, n) to N != 0 ? -1 : 0. |
| %c0_2 = call i32 @strncmp(i8* %p0, i8* %q2, i64 %n) |
| %s0_2 = getelementptr i32, i32* %pcmp, i64 2 |
| store i32 %c0_2, i32* %s0_2 |
| |
| ; Fold strncmp(a, b + 3, n) to N != 0 ? -1 : 0. |
| %c0_3 = call i32 @strncmp(i8* %p0, i8* %q3, i64 %n) |
| %s0_3 = getelementptr i32, i32* %pcmp, i64 3 |
| store i32 %c0_3, i32* %s0_3 |
| |
| ; Fold strncmp(a, b + 4, n) to 0. |
| %c0_4 = call i32 @strncmp(i8* %p0, i8* %q4, i64 %n) |
| %s0_4 = getelementptr i32, i32* %pcmp, i64 4 |
| store i32 %c0_4, i32* %s0_4 |
| |
| ; Fold strncmp(a, b + 5, n) to N != 0 ? -1 : 0. |
| %c0_5 = call i32 @strncmp(i8* %p0, i8* %q5, i64 %n) |
| %s0_5 = getelementptr i32, i32* %pcmp, i64 5 |
| store i32 %c0_5, i32* %s0_5 |
| |
| ; Fold strncmp(b + 5, a, n) to N != 0 ? +1 : 0. |
| %c5_0 = call i32 @strncmp(i8* %q5, i8* %p0, i64 %n) |
| %s5_0 = getelementptr i32, i32* %pcmp, i64 6 |
| store i32 %c5_0, i32* %s5_0 |
| |
| ret void |
| } |
| |
| ; Vefify that a strncmp() call involving a constant array with unknown |
| ; contents is not folded. |
| |
| define void @call_strncmp_a_ax_n(i32* %pcmp, i64 %n) { |
| ; CHECK-LABEL: @call_strncmp_a_ax_n( |
| ; CHECK-NEXT: [[C0_0:%.*]] = call i32 @strncmp(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @a01230123, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @ax, i64 0, i64 0), i64 [[N:%.*]]) |
| ; CHECK-NEXT: store i32 [[C0_0]], i32* [[PCMP:%.*]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| |
| %p0 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 0 |
| %q0 = getelementptr [8 x i8], [8 x i8]* @ax, i64 0, i64 0 |
| |
| ; Do not fold strncmp(a, ax, n). |
| %c0_0 = call i32 @strncmp(i8* %p0, i8* %q0, i64 %n) |
| %s0_0 = getelementptr i32, i32* %pcmp, i64 0 |
| store i32 %c0_0, i32* %s0_0 |
| |
| ret void |
| } |
| |
| |
| ; Exercise strncmp(A, C, N) folding of arrays with the same leading bytes |
| ; but a difference in the trailing byte. |
| |
| define void @fold_strncmp_a_c_n(i32* %pcmp, i64 %n) { |
| ; CHECK-LABEL: @fold_strncmp_a_c_n( |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i64 [[N:%.*]], 7 |
| ; CHECK-NEXT: [[TMP2:%.*]] = sext i1 [[TMP1]] to i32 |
| ; CHECK-NEXT: store i32 [[TMP2]], i32* [[PCMP:%.*]], align 4 |
| ; CHECK-NEXT: [[TMP3:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i1 [[TMP3]] to i32 |
| ; CHECK-NEXT: [[S0_1:%.*]] = getelementptr i32, i32* [[PCMP]], i64 1 |
| ; CHECK-NEXT: store i32 [[TMP4]], i32* [[S0_1]], align 4 |
| ; CHECK-NEXT: [[TMP5:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP6:%.*]] = sext i1 [[TMP5]] to i32 |
| ; CHECK-NEXT: [[S0_2:%.*]] = getelementptr i32, i32* [[PCMP]], i64 2 |
| ; CHECK-NEXT: store i32 [[TMP6]], i32* [[S0_2]], align 4 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP8:%.*]] = sext i1 [[TMP7]] to i32 |
| ; CHECK-NEXT: [[S0_3:%.*]] = getelementptr i32, i32* [[PCMP]], i64 3 |
| ; CHECK-NEXT: store i32 [[TMP8]], i32* [[S0_3]], align 4 |
| ; CHECK-NEXT: [[TMP9:%.*]] = icmp ugt i64 [[N]], 3 |
| ; CHECK-NEXT: [[TMP10:%.*]] = sext i1 [[TMP9]] to i32 |
| ; CHECK-NEXT: [[S0_4:%.*]] = getelementptr i32, i32* [[PCMP]], i64 4 |
| ; CHECK-NEXT: store i32 [[TMP10]], i32* [[S0_4]], align 4 |
| ; CHECK-NEXT: [[TMP11:%.*]] = icmp ugt i64 [[N]], 3 |
| ; CHECK-NEXT: [[TMP12:%.*]] = sext i1 [[TMP11]] to i32 |
| ; CHECK-NEXT: [[S0_5:%.*]] = getelementptr i32, i32* [[PCMP]], i64 5 |
| ; CHECK-NEXT: store i32 [[TMP12]], i32* [[S0_5]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| |
| %p0 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 0 |
| |
| %q0 = getelementptr [8 x i8], [8 x i8]* @c01230129, i64 0, i64 0 |
| %q1 = getelementptr [8 x i8], [8 x i8]* @c01230129, i64 0, i64 1 |
| %q2 = getelementptr [8 x i8], [8 x i8]* @c01230129, i64 0, i64 2 |
| %q3 = getelementptr [8 x i8], [8 x i8]* @c01230129, i64 0, i64 3 |
| %q4 = getelementptr [8 x i8], [8 x i8]* @c01230129, i64 0, i64 4 |
| %q5 = getelementptr [8 x i8], [8 x i8]* @c01230129, i64 0, i64 5 |
| |
| ; Fold strncmp(a, c, n) to N > 7 ? -1 : 0. |
| %c0_0 = call i32 @strncmp(i8* %p0, i8* %q0, i64 %n) |
| %s0_0 = getelementptr i32, i32* %pcmp, i64 0 |
| store i32 %c0_0, i32* %s0_0 |
| |
| ; Fold strncmp(a, c + 1, n) to N != 0 ? -1 : 0. |
| %c0_1 = call i32 @strncmp(i8* %p0, i8* %q1, i64 %n) |
| %s0_1 = getelementptr i32, i32* %pcmp, i64 1 |
| store i32 %c0_1, i32* %s0_1 |
| |
| ; Fold strncmp(a, c + 2, n) to N != 0 ? -1 : 0. |
| %c0_2 = call i32 @strncmp(i8* %p0, i8* %q2, i64 %n) |
| %s0_2 = getelementptr i32, i32* %pcmp, i64 2 |
| store i32 %c0_2, i32* %s0_2 |
| |
| ; Fold strncmp(a, c + 3, n) to N != 0 ? -1 : 0. |
| %c0_3 = call i32 @strncmp(i8* %p0, i8* %q3, i64 %n) |
| %s0_3 = getelementptr i32, i32* %pcmp, i64 3 |
| store i32 %c0_3, i32* %s0_3 |
| |
| ; Fold strncmp(a, c + 4, n) to N > 3 ? -1 : 0. |
| %c0_4 = call i32 @strncmp(i8* %p0, i8* %q4, i64 %n) |
| %s0_4 = getelementptr i32, i32* %pcmp, i64 4 |
| store i32 %c0_4, i32* %s0_4 |
| |
| ; Fold strncmp(a, c + 5, n) to N != 0 ? -1 : 0. |
| %c0_5 = call i32 @strncmp(i8* %p0, i8* %q4, i64 %n) |
| %s0_5 = getelementptr i32, i32* %pcmp, i64 5 |
| store i32 %c0_5, i32* %s0_5 |
| |
| ret void |
| } |
| |
| |
| ; Exercise strncmp(A, D, N) folding of arrays of different sizes and |
| ; a difference in the leading byte. |
| |
| define void @fold_strncmp_a_d_n(i32* %pcmp, i64 %n) { |
| ; CHECK-LABEL: @fold_strncmp_a_d_n( |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i64 [[N:%.*]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = sext i1 [[TMP1]] to i32 |
| ; CHECK-NEXT: store i32 [[TMP2]], i32* [[PCMP:%.*]], align 4 |
| ; CHECK-NEXT: [[TMP3:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i1 [[TMP3]] to i32 |
| ; CHECK-NEXT: [[S0_1:%.*]] = getelementptr i32, i32* [[PCMP]], i64 1 |
| ; CHECK-NEXT: store i32 [[TMP4]], i32* [[S0_1]], align 4 |
| ; CHECK-NEXT: [[TMP5:%.*]] = icmp ugt i64 [[N]], 3 |
| ; CHECK-NEXT: [[TMP6:%.*]] = zext i1 [[TMP5]] to i32 |
| ; CHECK-NEXT: [[S1_1:%.*]] = getelementptr i32, i32* [[PCMP]], i64 2 |
| ; CHECK-NEXT: store i32 [[TMP6]], i32* [[S1_1]], align 4 |
| ; CHECK-NEXT: [[TMP7:%.*]] = icmp ugt i64 [[N]], 2 |
| ; CHECK-NEXT: [[TMP8:%.*]] = zext i1 [[TMP7]] to i32 |
| ; CHECK-NEXT: [[S2_2:%.*]] = getelementptr i32, i32* [[PCMP]], i64 3 |
| ; CHECK-NEXT: store i32 [[TMP8]], i32* [[S2_2]], align 4 |
| ; CHECK-NEXT: [[TMP9:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP10:%.*]] = zext i1 [[TMP9]] to i32 |
| ; CHECK-NEXT: [[S4_4:%.*]] = getelementptr i32, i32* [[PCMP]], i64 4 |
| ; CHECK-NEXT: store i32 [[TMP10]], i32* [[S4_4]], align 4 |
| ; CHECK-NEXT: [[TMP11:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP12:%.*]] = sext i1 [[TMP11]] to i32 |
| ; CHECK-NEXT: [[S4_4_2:%.*]] = getelementptr i32, i32* [[PCMP]], i64 5 |
| ; CHECK-NEXT: store i32 [[TMP12]], i32* [[S4_4_2]], align 4 |
| ; CHECK-NEXT: [[S5_5:%.*]] = getelementptr i32, i32* [[PCMP]], i64 6 |
| ; CHECK-NEXT: store i32 0, i32* [[S5_5]], align 4 |
| ; CHECK-NEXT: [[S6_6:%.*]] = getelementptr i32, i32* [[PCMP]], i64 7 |
| ; CHECK-NEXT: store i32 0, i32* [[S6_6]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| |
| %p0 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 0 |
| %p1 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 1 |
| %p2 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 2 |
| %p3 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 3 |
| %p4 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 4 |
| %p5 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 5 |
| %p6 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 6 |
| |
| %q0 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 0 |
| %q1 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 1 |
| %q2 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 2 |
| %q3 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 3 |
| %q4 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 4 |
| %q5 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 5 |
| %q6 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 6 |
| |
| ; Fold strncmp(a, d, n) to N != 0 ? -1 : 0. |
| %c0_0 = call i32 @strncmp(i8* %p0, i8* %q0, i64 %n) |
| %s0_0 = getelementptr i32, i32* %pcmp, i64 0 |
| store i32 %c0_0, i32* %s0_0 |
| |
| ; Fold strncmp(a, d + 1, n) to N != 0 ? -1 : 0. |
| %c0_1 = call i32 @strncmp(i8* %p0, i8* %q1, i64 %n) |
| %s0_1 = getelementptr i32, i32* %pcmp, i64 1 |
| store i32 %c0_1, i32* %s0_1 |
| |
| ; Fold strncmp(a + 1, d + 1, n) N > 3 ? +1 : 0. |
| %c1_1 = call i32 @strncmp(i8* %p1, i8* %q1, i64 %n) |
| %s1_1 = getelementptr i32, i32* %pcmp, i64 2 |
| store i32 %c1_1, i32* %s1_1 |
| |
| ; Fold strncmp(a + 2, d + 2, n) N > 2 ? +1 : 0. |
| %c2_2 = call i32 @strncmp(i8* %p2, i8* %q2, i64 %n) |
| %s2_2 = getelementptr i32, i32* %pcmp, i64 3 |
| store i32 %c2_2, i32* %s2_2 |
| |
| ; Fold strncmp(a + 3, d + 3, n) N > 1 ? +1 : 0. |
| %c3_3 = call i32 @strncmp(i8* %p3, i8* %q3, i64 %n) |
| %s3_3 = getelementptr i32, i32* %pcmp, i64 4 |
| store i32 %c3_3, i32* %s3_3 |
| |
| ; Fold strncmp(a + 4, d + 4, n) N != 0 ? +1 : 0. |
| %c4_4 = call i32 @strncmp(i8* %p4, i8* %q4, i64 %n) |
| %s4_4 = getelementptr i32, i32* %pcmp, i64 4 |
| store i32 %c4_4, i32* %s4_4 |
| |
| ; Fold strncmp(d + 4, a + 4, n) N != 0 ? -1 : 0 (same as above but |
| ; with the array arguments reversed). |
| %c4_4_2 = call i32 @strncmp(i8* %q4, i8* %p4, i64 %n) |
| %s4_4_2 = getelementptr i32, i32* %pcmp, i64 5 |
| store i32 %c4_4_2, i32* %s4_4_2 |
| |
| ; Fold strncmp(a + 5, d + 5, n) to 0. |
| %c5_5 = call i32 @strncmp(i8* %p5, i8* %q5, i64 %n) |
| %s5_5 = getelementptr i32, i32* %pcmp, i64 6 |
| store i32 %c5_5, i32* %s5_5 |
| |
| ; Fold strncmp(a + 6, d + 6, n) to 0. |
| %c6_6 = call i32 @strncmp(i8* %p6, i8* %q6, i64 %n) |
| %s6_6 = getelementptr i32, i32* %pcmp, i64 7 |
| store i32 %c6_6, i32* %s6_6 |
| |
| ret void |
| } |
| |
| |
| ; Exercise strncmp(A, D, N) folding of arrays with the same bytes and |
| ; a nonzero size. |
| |
| define void @fold_strncmp_a_d_nz(i32* %pcmp, i64 %n) { |
| ; CHECK-LABEL: @fold_strncmp_a_d_nz( |
| ; CHECK-NEXT: store i32 -1, i32* [[PCMP:%.*]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| |
| %p0 = getelementptr [8 x i8], [8 x i8]* @a01230123, i64 0, i64 0 |
| %q0 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 0 |
| %nz = or i64 %n, 1 |
| |
| %c0_0 = call i32 @strncmp(i8* %p0, i8* %q0, i64 %nz) |
| %s0_0 = getelementptr i32, i32* %pcmp, i64 0 |
| store i32 %c0_0, i32* %s0_0 |
| |
| ret void |
| } |
| |
| |
| ; Exercise strncmp(D, E, N) folding of equal strings but unequal arrays. |
| |
| define void @fold_strncmp_d_e_n(i32* %pcmp, i64 %n) { |
| ; CHECK-LABEL: @fold_strncmp_d_e_n( |
| ; CHECK-NEXT: store i32 0, i32* [[PCMP:%.*]], align 4 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i64 [[N:%.*]], 0 |
| ; CHECK-NEXT: [[TMP2:%.*]] = zext i1 [[TMP1]] to i32 |
| ; CHECK-NEXT: [[S0_1:%.*]] = getelementptr i32, i32* [[PCMP]], i64 1 |
| ; CHECK-NEXT: store i32 [[TMP2]], i32* [[S0_1]], align 4 |
| ; CHECK-NEXT: [[TMP3:%.*]] = icmp ne i64 [[N]], 0 |
| ; CHECK-NEXT: [[TMP4:%.*]] = sext i1 [[TMP3]] to i32 |
| ; CHECK-NEXT: [[S1_0:%.*]] = getelementptr i32, i32* [[PCMP]], i64 2 |
| ; CHECK-NEXT: store i32 [[TMP4]], i32* [[S1_0]], align 4 |
| ; CHECK-NEXT: [[S1_1:%.*]] = getelementptr i32, i32* [[PCMP]], i64 3 |
| ; CHECK-NEXT: store i32 0, i32* [[S1_1]], align 4 |
| ; CHECK-NEXT: ret void |
| ; |
| |
| %p0 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 0 |
| %p1 = getelementptr [7 x i8], [7 x i8]* @d9123_12, i64 0, i64 1 |
| |
| %q0 = getelementptr [7 x i8], [7 x i8]* @e9123_34, i64 0, i64 0 |
| %q1 = getelementptr [7 x i8], [7 x i8]* @e9123_34, i64 0, i64 1 |
| |
| ; Fold to 0. |
| %c0_0 = call i32 @strncmp(i8* %p0, i8* %q0, i64 %n) |
| %s0_0 = getelementptr i32, i32* %pcmp, i64 0 |
| store i32 %c0_0, i32* %s0_0 |
| |
| ; Fold to N ? +1 : 0. |
| %c0_1 = call i32 @strncmp(i8* %p0, i8* %q1, i64 %n) |
| %s0_1 = getelementptr i32, i32* %pcmp, i64 1 |
| store i32 %c0_1, i32* %s0_1 |
| |
| ; Fold to N ? -1 : 0. |
| %c1_0 = call i32 @strncmp(i8* %p1, i8* %q0, i64 %n) |
| %s1_0 = getelementptr i32, i32* %pcmp, i64 2 |
| store i32 %c1_0, i32* %s1_0 |
| |
| ; Fold to 0. |
| %c1_1 = call i32 @strncmp(i8* %p1, i8* %q1, i64 %n) |
| %s1_1 = getelementptr i32, i32* %pcmp, i64 3 |
| store i32 %c1_1, i32* %s1_1 |
| |
| ret void |
| } |