1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=nsan -nsan-shadow-type-mapping=dqq -S | FileCheck %s 3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4 5; Tests with more involved control flow to check lazy construction of the 6; shadow values. 7 8define float @forward_use() sanitize_numerical_stability { 9; CHECK-LABEL: @forward_use( 10; CHECK-NEXT: entry: 11; CHECK-NEXT: br label [[BLOCK1:%.*]] 12; CHECK: loop: 13; CHECK-NEXT: [[D:%.*]] = fadd float [[B:%.*]], 2.000000e+00 14; CHECK-NEXT: [[TMP0:%.*]] = fadd double [[TMP2:%.*]], 2.000000e+00 15; CHECK-NEXT: br label [[BLOCK1]] 16; CHECK: block1: 17; CHECK-NEXT: [[A:%.*]] = phi float [ [[D]], [[LOOP:%.*]] ], [ 1.000000e+00, [[ENTRY:%.*]] ] 18; CHECK-NEXT: [[TMP1:%.*]] = phi double [ [[TMP0]], [[LOOP]] ], [ 1.000000e+00, [[ENTRY]] ] 19; CHECK-NEXT: [[B]] = fadd float [[A]], 1.000000e+00 20; CHECK-NEXT: [[TMP2]] = fadd double [[TMP1]], 1.000000e+00 21; CHECK-NEXT: br label [[LOOP]] 22; 23 24entry: 25 br label %block1 26 27loop: 28 %d = fadd float %b, 2.0 ; this is a forward reference, requiring shadow(%b) to be available. 29 br label %block1 30 31block1: 32 %a = phi float [ %d, %loop], [ 1.0, %entry ] 33 %b = fadd float %a, 1.0 34 br label %loop 35} 36 37define float @forward_use_with_load(float* %p) sanitize_numerical_stability { 38; CHECK-LABEL: @forward_use_with_load( 39; CHECK-NEXT: entry: 40; CHECK-NEXT: br label [[BLOCK1:%.*]] 41; CHECK: loop: 42; CHECK-NEXT: [[D:%.*]] = fadd float [[B:%.*]], 2.000000e+00 43; CHECK-NEXT: [[TMP0:%.*]] = fadd double [[TMP10:%.*]], 2.000000e+00 44; CHECK-NEXT: br label [[BLOCK1]] 45; CHECK: block1: 46; CHECK-NEXT: [[A:%.*]] = phi float [ [[D]], [[LOOP:%.*]] ], [ 1.000000e+00, [[ENTRY:%.*]] ] 47; CHECK-NEXT: [[TMP1:%.*]] = phi double [ [[TMP0]], [[LOOP]] ], [ 1.000000e+00, [[ENTRY]] ] 48; CHECK-NEXT: [[L:%.*]] = load float, ptr [[P:%.*]], align 4 49; CHECK-NEXT: [[TMP2:%.*]] = call ptr @__nsan_get_shadow_ptr_for_float_load(ptr [[P]], i64 1) 50; CHECK-NEXT: [[TMP3:%.*]] = icmp eq ptr [[TMP2]], null 51; CHECK-NEXT: br i1 [[TMP3]], label [[TMP6:%.*]], label [[TMP4:%.*]] 52; CHECK: 4: 53; CHECK-NEXT: [[TMP5:%.*]] = load double, ptr [[TMP2]], align 1 54; CHECK-NEXT: br label [[TMP8:%.*]] 55; CHECK: 6: 56; CHECK-NEXT: [[TMP7:%.*]] = fpext float [[L]] to double 57; CHECK-NEXT: br label [[TMP8]] 58; CHECK: 8: 59; CHECK-NEXT: [[TMP9:%.*]] = phi double [ [[TMP5]], [[TMP4]] ], [ [[TMP7]], [[TMP6]] ] 60; CHECK-NEXT: [[B]] = fadd float [[L]], 1.000000e+00 61; CHECK-NEXT: [[TMP10]] = fadd double [[TMP9]], 1.000000e+00 62; CHECK-NEXT: br label [[LOOP]] 63; 64 65entry: 66 br label %block1 67 68loop: 69 %d = fadd float %b, 2.0 ; this is a forward reference, requiring shadow(%b) to be available. 70 br label %block1 71 72block1: 73 %a = phi float [ %d, %loop], [ 1.0, %entry ] 74 %l = load float, float* %p ; the load creates a new block 75 %b = fadd float %l, 1.0 ; this requires shadow(%l). 76 br label %loop 77} 78 79define float @forward_use_with_two_uses() sanitize_numerical_stability { 80; CHECK-LABEL: @forward_use_with_two_uses( 81; CHECK-NEXT: entry: 82; CHECK-NEXT: br label [[BLOCK1:%.*]] 83; CHECK: loop: 84; CHECK-NEXT: [[D:%.*]] = fadd float [[B:%.*]], 2.000000e+00 85; CHECK-NEXT: [[TMP0:%.*]] = fadd double [[TMP4:%.*]], 2.000000e+00 86; CHECK-NEXT: br label [[BLOCK1]] 87; CHECK: block1: 88; CHECK-NEXT: [[A:%.*]] = phi float [ [[D]], [[LOOP:%.*]] ], [ 1.000000e+00, [[ENTRY:%.*]] ] 89; CHECK-NEXT: [[TMP1:%.*]] = phi double [ [[TMP0]], [[LOOP]] ], [ 1.000000e+00, [[ENTRY]] ] 90; CHECK-NEXT: [[T1:%.*]] = fadd float [[A]], 1.000000e+00 91; CHECK-NEXT: [[TMP2:%.*]] = fadd double [[TMP1]], 1.000000e+00 92; CHECK-NEXT: [[T2:%.*]] = fadd float [[T1]], 3.000000e+00 93; CHECK-NEXT: [[TMP3:%.*]] = fadd double [[TMP2]], 3.000000e+00 94; CHECK-NEXT: [[B]] = fadd float [[T1]], [[T2]] 95; CHECK-NEXT: [[TMP4]] = fadd double [[TMP2]], [[TMP3]] 96; CHECK-NEXT: br label [[LOOP]] 97; 98 99entry: 100 br label %block1 101 102loop: 103 %d = fadd float %b, 2.0 ; this is a forward reference, requiring shadow(%b) to be available. 104 br label %block1 105 106block1: 107 %a = phi float [ %d, %loop], [ 1.0, %entry ] 108 %t1 = fadd float %a, 1.0 109 %t2 = fadd float %t1, 3.0 ; this requires shadow(%t1) 110 %b = fadd float %t1, %t2 ; this requires shadow(%t2) and shadow(%t1). 111 br label %loop 112} 113