Revert "[SYCL][Driver] Force precise division rounding for precise model (#12173)

This commit reverts #12107 and the
follow-up patch due to unforeseen consequences of the new flag.

Author: steffenlarsen

clang/lib/Driver/ToolChains/SYCL.cpp

@@ -1247,11 +1247,6 @@ void SYCLToolChain::AddImpliedTargetArgs(const llvm::Triple &Triple,
     if (Arg *A = Args.getLastArg(options::OPT_O_Group))
       if (A->getOption().matches(options::OPT_O0))
         BeArgs.push_back("-cl-opt-disable");
-  // In precise floating-point mode we pass the OpenCL flag forcing division to
-  // be correctly rounded.
-  if (Arg *A = Args.getLastArg(options::OPT_ffp_model_EQ))
-    if (StringRef{A->getValue()}.equals("precise"))
-      BeArgs.push_back("-cl-fp32-correctly-rounded-divide-sqrt");
   StringRef RegAllocModeOptName = "-ftarget-register-alloc-mode=";
   if (Arg *A = Args.getLastArg(options::OPT_ftarget_register_alloc_mode_EQ)) {
     StringRef RegAllocModeVal = A->getValue(0);

clang/test/Driver/sycl-offload-aot.cpp

@@ -220,18 +220,6 @@
 // RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-OPTS-GEN %s
 // CHK-TOOLS-IMPLIED-OPTS-GEN: ocloc{{.*}} "-options" "-g -cl-opt-disable" "-DFOO1" "-DFOO2"
 
-// RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64_fpga-unknown-unknown -ffp-model=precise -Xsycl-target-backend "-DFOO1 -DFOO2" %s 2>&1 \
-// RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-ROUNDING-FPGA %s
-// CHK-TOOLS-IMPLIED-ROUNDING-FPGA: opencl-aot{{.*}} "--bo=-cl-fp32-correctly-rounded-divide-sqrt" "-DFOO1" "-DFOO2"
-
-// RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64_x86_64-unknown-unknown -ffp-model=precise -Xsycl-target-backend "-DFOO1 -DFOO2" %s 2>&1 \
-// RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-ROUNDING-CPU %s
-// CHK-TOOLS-IMPLIED-ROUNDING-CPU: opencl-aot{{.*}} "--bo=-cl-fp32-correctly-rounded-divide-sqrt" "-DFOO1" "-DFOO2"
-
-// RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64_gen-unknown-unknown -ffp-model=precise -Xsycl-target-backend "-DFOO1 -DFOO2" %s 2>&1 \
-// RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-ROUNDING-GEN %s
-// CHK-TOOLS-IMPLIED-ROUNDING-GEN: ocloc{{.*}} "-options" "-cl-fp32-correctly-rounded-divide-sqrt" "-DFOO1" "-DFOO2"
-
 /// Check -Xsycl-target-linker option passing
 // RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64_fpga-unknown-unknown -Xshardware -Xsycl-target-linker "-DFOO1 -DFOO2" %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHK-TOOLS-FPGA-OPTS2 %s

clang/test/Driver/sycl-offload.c

@@ -424,11 +424,6 @@
 // CHK-TOOLS-IMPLIED-OPTS-O0-NOT: clang-offload-wrapper{{.*}} "-compile-opts={{.*}}-cl-opt-disable"
 // CHK-TOOLS-IMPLIED-OPTS-O2-NOT: clang-offload-wrapper{{.*}} "-compile-opts={{.*}}-cl-opt-disable"
 
-/// Check for implied options (-ffp-model=precise)
-// RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64 -ffp-model=precise %s 2>&1 \
-// RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-ROUNDING %s
-// CHK-TOOLS-IMPLIED-ROUNDING: clang-offload-wrapper{{.*}} "-compile-opts={{.*}}-cl-fp32-correctly-rounded-divide-sqrt
-
 // RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64-unknown-unknown -Xsycl-target-linker "-DFOO1 -DFOO2" %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHK-TOOLS-OPTS2 %s
 // CHK-TOOLS-OPTS2: clang-offload-wrapper{{.*}} "-link-opts=-DFOO1 -DFOO2"