Mesa (master): ac: rework ac_llvm_extract_elem()

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: 4a0c24f2dd97c670259a7ab0ced701dbf9bb5dd7
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4a0c24f2dd97c670259a7ab0ced701dbf9bb5dd7

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Wed Dec 13 18:46:56 2017 +1100

ac: rework ac_llvm_extract_elem()

Simplifies the logic a little and asserts index is 0.

Suggested-by: Nicolai Hähnle <nhaehnle at gmail.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>

---

 src/amd/common/ac_llvm_build.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 0ea5e7f4ca..8a3a2abf17 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -114,10 +114,10 @@ ac_llvm_extract_elem(struct ac_llvm_context *ac,
 		     LLVMValueRef value,
 		     int index)
 {
-	int count = ac_get_llvm_num_components(value);
-
-	if (count == 1)
+	if (LLVMGetTypeKind(LLVMTypeOf(value)) != LLVMVectorTypeKind) {
+		assert(index == 0);
 		return value;
+	}
 
 	return LLVMBuildExtractElement(ac->builder, value,
 				       LLVMConstInt(ac->i32, index, false), "");