222 lines
6.8 KiB
C
222 lines
6.8 KiB
C
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// RUN: %clang_cc1 -std=c99 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C99 %s
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// RUN: %clang_cc1 -std=c11 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C11 %s
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// RUN: %clang_cc1 -std=c18 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C11 %s
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// RUN: %clang_cc1 -std=c2x -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C11 %s
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//
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// RUN: %clang_cc1 -std=c11 -ffinite-loops -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=FINITE %s
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// RUN: %clang_cc1 -std=c11 -fno-finite-loops -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C99 %s
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int a = 0;
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int b = 0;
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// CHECK: datalayout
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//
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @f0(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %for.cond
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// CHECK: for.cond:
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// CHECK-NOT: br {{.*}}!llvm.loop
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//
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void f0() {
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for (; ;) ;
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @f1(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %for.cond
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// CHECK: for.cond:
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// CHECK-NEXT: br i1 true, label %for.body, label %for.end
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// CHECK: for.body:
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// CHECK-NOT: br {{.*}}, !llvm.loop
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// CHECK: for.end:
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// CHECK-NEXT: ret void
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//
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void f1() {
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for (; 1;) {
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}
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @f2(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %for.cond
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// CHECK: for.cond:
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
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// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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// CHECK-NEXT: br i1 [[CMP]], label %for.body, label %for.end
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// CHECK: for.body:
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// C99-NOT: br {{.*}} !llvm.loop
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// C11: br label %for.cond, !llvm.loop [[LOOP1:!.*]]
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// FINITE: br label %for.cond, !llvm.loop [[LOOP1:!.*]]
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// CHECK: for.end:
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// CHECK-NEXT: ret void
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//
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void f2() {
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for (; a == b;) {
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}
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @F(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %for.cond
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// CHECK: for.cond:
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// CHECK-NEXT: br i1 true, label %for.body, label %for.end
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// CHECK: for.body:
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// CHECK-NOT: br {{.*}}, !llvm.loop
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// CHECK: for.end:
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// CHECK-NEXT: br label %for.cond1
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// CHECK: for.cond1:
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
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// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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// CHECK-NEXT: br i1 [[CMP]], label %for.body2, label %for.end3
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// CHECK: for.body2:
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// C99-NOT: br {{.*}}, !llvm.loop
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// C11: br label %for.cond1, !llvm.loop [[LOOP2:!.*]]
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// FINITE: br label %for.cond1, !llvm.loop [[LOOP2:!.*]]
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// CHECK: for.end3:
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// CHECK-NEXT: ret void
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//
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void F() {
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for (; 1;) {
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}
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for (; a == b;) {
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}
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @w1(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %while.body
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// CHECK: while.body:
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// CHECK-NOT: br {{.*}}, !llvm.loop
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//
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void w1() {
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while (1) {
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}
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @w2(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %while.cond
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// CHECK: while.cond:
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
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// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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// CHECK-NEXT: br i1 [[CMP]], label %while.body, label %while.end
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// CHECK: while.body:
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// C99-NOT: br {{.*}}, !llvm.loop
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// C11: br label %while.cond, !llvm.loop [[LOOP3:!.*]]
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// FINITE: br label %while.cond, !llvm.loop [[LOOP3:!.*]]
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// CHECK: while.end:
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// CHECK-NEXT: ret void
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//
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void w2() {
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while (a == b) {
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}
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @W(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label [[WHILE_COND:%.*]]
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// CHECK: while.cond:
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
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// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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// CHECK-NEXT: br i1 [[CMP]], label %while.body, label %while.end
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// CHECK: while.body:
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// C99-NOT: br {{.*}} !llvm.loop
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// C11: br label %while.cond, !llvm.loop [[LOOP4:!.*]]
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// FINITE: br label %while.cond, !llvm.loop [[LOOP4:!.*]]
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// CHECK: while.end:
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// CHECK-NEXT: br label %while.body2
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// CHECK: while.body2:
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// CHECK-NOT: br {{.*}} !llvm.loop
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//
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void W() {
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while (a == b) {
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}
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while (1) {
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}
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @d1(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %do.body
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// CHECK: do.body:
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// CHECK-NEXT: br label %do.cond
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// CHECK: do.cond:
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// CHECK-NOT: br {{.*}}, !llvm.loop
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// CHECK: do.end:
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// CHECK-NEXT: ret void
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//
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void d1() {
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do {
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} while (1);
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @d2(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %do.body
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// CHECK: do.body:
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// CHECK-NEXT: br label %do.cond
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// CHECK: do.cond:
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
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// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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// C99-NOT: br {{.*}}, !llvm.loop
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// C11: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP5:!.*]]
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// FINITE: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP5:!.*]]
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// CHECK: do.end:
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// CHECK-NEXT: ret void
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//
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void d2() {
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do {
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} while (a == b);
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}
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// CHECK-NOT: mustprogress
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// CHECK-LABEL: @D(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: br label %do.body
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// CHECK: do.body:
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// CHECK-NEXT: br label %do.cond
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// CHECK: do.cond:
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// CHECK-NOT: br label {{.*}}, !llvm.loop
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// CHECK: do.end:
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// CHECK-NEXT: br label %do.body1
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// CHECK: do.body1:
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// CHECK-NEXT: br label %do.cond2
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// CHECK: do.cond2:
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// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
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// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
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// C99-NOT: br {{.*}}, !llvm.loop
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// C11: br i1 [[CMP]], label %do.body1, label %do.end3, !llvm.loop [[LOOP6:!.*]]
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// FINITE: br i1 [[CMP]], label %do.body1, label %do.end3, !llvm.loop [[LOOP6:!.*]]
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// CHECK: do.end3:
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// CHECK-NEXT: ret void
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//
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void D() {
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do {
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} while (1);
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do {
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} while (a == b);
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}
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// C11: [[LOOP1]] = distinct !{[[LOOP1]], [[MP:!.*]]}
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// C11: [[MP]] = !{!"llvm.loop.mustprogress"}
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// C11: [[LOOP2]] = distinct !{[[LOOP2]], [[MP]]}
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// C11: [[LOOP3]] = distinct !{[[LOOP3]], [[MP]]}
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// C11: [[LOOP4]] = distinct !{[[LOOP4]], [[MP]]}
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// C11: [[LOOP5]] = distinct !{[[LOOP5]], [[MP]]}
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// C11: [[LOOP6]] = distinct !{[[LOOP6]], [[MP]]}
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