From: Dave Airlie <[email protected]>

Use the newer intrinsic.

Signed-off-by: Dave Airlie <[email protected]>
---
 src/amd/common/ac_llvm_build.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 180fd24..dda2c0b 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -769,7 +769,8 @@ ac_emit_imsb(struct ac_llvm_context *ctx,
             LLVMValueRef arg,
             LLVMTypeRef dst_type)
 {
-       LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, "llvm.AMDGPU.flbit.i32",
+       const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.AMDGPU.flbit.i32" 
: "llvm.amdgcn.sffbh";
+       LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, intr_name,
                                                  dst_type, &arg, 1,
                                                  AC_FUNC_ATTR_READNONE);
 
-- 
2.7.4

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