[CodeGen] Print executed statement instances at runtime.

Add the options -polly-codegen-trace-stmts and
-polly-codegen-trace-scalars. When enabled, adds a call to the
beginning of every generated statement that prints the executed
statement instance. With -polly-codegen-trace-scalars, it also prints
the value of all scalars that are used in the statement, and PHIs
defined in the beginning of the statement.

Differential Revision: https://reviews.llvm.org/D45743

llvm-svn: 330864

1 files changed, 38 insertions, 0 deletions

diff --git a/polly/test/Isl/CodeGen/RuntimeDebugBuilder/stmt_tracing.ll b/polly/test/Isl/CodeGen/RuntimeDebugBuilder/stmt_tracing.ll
new file mode 100644
index 00000000000..456b33a0b7e
--- /dev/null
+++ b/polly/test/Isl/CodeGen/RuntimeDebugBuilder/stmt_tracing.ll
@@ -0,0 +1,38 @@
+; RUN: opt %loadPolly -polly-codegen-trace-stmts -polly-codegen-trace-scalars -polly-codegen -S < %s | FileCheck %s
+;
+
+define void @func(i32 %n, double* %A) {
+entry:
+  br label %for
+
+for:
+  %j = phi i32 [0, %entry], [%j.inc, %inc]
+  %j.cmp = icmp slt i32 %j, %n
+  br i1 %j.cmp, label %body, label %exit
+
+    body:
+      %A_idx = getelementptr inbounds double, double* %A, i32 %j
+      store double 0.0, double* %A_idx
+      br label %inc
+
+inc:
+  %j.inc = add nuw nsw i32 %j, 1
+  br label %for
+
+exit:
+  br label %return
+
+return:
+  ret void
+}
+
+
+; CHECK: @0 = private unnamed_addr addrspace(4) constant [10 x i8] c"Stmt_body\00"
+; CHECK: @1 = private unnamed_addr addrspace(4) constant [2 x i8] c"(\00"
+; CHECK: @2 = private unnamed_addr addrspace(4) constant [2 x i8] c")\00"
+; CHECK: @3 = private unnamed_addr addrspace(4) constant [2 x i8] c"\0A\00"
+; CHECK: @4 = private unnamed_addr constant [12 x i8] c"%s%s%ld%s%s\00"
+
+; CHECK:      polly.stmt.body:
+; CHECK:        call i32 (...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @4, i32 0, i32 0), i8 addrspace(4)* getelementptr inbounds ([10 x i8], [10 x i8] addrspace(4)* @0, i32 0, i32 0), i8 addrspace(4)* getelementptr inbounds ([2 x i8], [2 x i8] addrspace(4)* @1, i32 0, i32 0), i64 %polly.indvar, i8 addrspace(4)* getelementptr inbounds ([2 x i8], [2 x i8] addrspace(4)* @2, i32 0, i32 0), i8 addrspace(4)* getelementptr inbounds ([2 x i8], [2 x i8] addrspace(4)* @3, i32 0, i32 0))
+; CHECK-NEXT:   call i32 @fflush(i8* null)