test/DebugInfo/KeyInstructions/if.c

// RUN: %clang_cc1 -triple x86_64-linux-gnu -gkey-instructions -x c++ -std=c++17 %s -debug-info-kind=line-tables-only -emit-llvm -o - \
// RUN: | FileCheck %s --implicit-check-not atomGroup --implicit-check-not atomRank --check-prefixes=CHECK,CHECK-CXX

// RUN: %clang_cc1 -triple x86_64-linux-gnu -gkey-instructions -x c %s -debug-info-kind=line-tables-only -emit-llvm -o - \
// RUN: | FileCheck %s --implicit-check-not atomGroup --implicit-check-not atomRank --check-prefixes=CHECK,CHECK-C

int g;
void a(int A) {
// The branch is a key instruction, with the condition being its backup.
// CHECK: entry:
// CHECK: %tobool = icmp ne i32 %0, 0{{.*}}, !dbg [[G1R2:!.*]]
// CHECK: br i1 %tobool, label %if.then, label %if.end{{.*}}, !dbg [[G1R1:!.*]]
    if (A)
        ;

// The assignment in the if gets a distinct source atom group.
// CHECK: if.end:
// CHECK: %1 = load i32, ptr %A.addr{{.*}}, !dbg [[G2R2:!.*]]
// CHECK: store i32 %1, ptr @g{{.*}}, !dbg [[G2R1:!.*]]
// CHECK: %tobool1 = icmp ne i32 %1, 0{{.*}}, !dbg [[G3R2:!.*]]
// CHECK: br i1 %tobool1, label %if.then2, label %if.end3{{.*}}, !dbg [[G3R1:!.*]]
    if ((g = A))
        ;

#ifdef __cplusplus
// The assignment in the if gets a distinct source atom group.
// CHECK-CXX: if.end3:
// CHECK-CXX: %2 = load i32, ptr %A.addr{{.*}}, !dbg [[G4R2:!.*]]
// CHECK-CXX: store i32 %2, ptr %B{{.*}}, !dbg [[G4R1:!.*]]
// CHECK-CXX: %tobool4 = icmp ne i32 %3, 0{{.*}}, !dbg [[G5R2:!.*]]
// CHECK-CXX: br i1 %tobool4, label %if.then5, label %if.end6{{.*}}, !dbg [[G5R1:!.*]]
    if (int B = A; B)
        ;
#endif

// CHECK: ret{{.*}}, !dbg [[RET:!.*]]
}

// CHECK: [[G1R2]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 2)
// CHECK: [[G1R1]] = !DILocation({{.*}}, atomGroup: 1, atomRank: 1)
// CHECK: [[G2R2]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 2)
// CHECK: [[G2R1]] = !DILocation({{.*}}, atomGroup: 2, atomRank: 1)
// CHECK: [[G3R2]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 2)
// CHECK: [[G3R1]] = !DILocation({{.*}}, atomGroup: 3, atomRank: 1)
// CHECK-CXX: [[G4R2]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 2)
// CHECK-CXX: [[G4R1]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 1)
// CHECK-CXX: [[G5R2]] = !DILocation({{.*}}, atomGroup: 5, atomRank: 2)
// CHECK-CXX: [[G5R1]] = !DILocation({{.*}}, atomGroup: 5, atomRank: 1)
// CHECK-CXX: [[RET]] = !DILocation({{.*}}, atomGroup: 6, atomRank: 1)
// CHECK-C: [[RET]] = !DILocation({{.*}}, atomGroup: 4, atomRank: 1)