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-rw-r--r--src/amd/common/ac_nir_to_llvm.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 83d8b9a4425..10d17738509 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -418,10 +418,24 @@ static LLVMValueRef emit_bitfield_extract(struct ac_llvm_context *ctx,
const LLVMValueRef srcs[3])
{
LLVMValueRef result;
- LLVMValueRef icond = LLVMBuildICmp(ctx->builder, LLVMIntEQ, srcs[2], LLVMConstInt(ctx->i32, 32, false), "");
- result = ac_build_bfe(ctx, srcs[0], srcs[1], srcs[2], is_signed);
- result = LLVMBuildSelect(ctx->builder, icond, srcs[0], result, "");
+ if (HAVE_LLVM < 0x0700) {
+ LLVMValueRef icond = LLVMBuildICmp(ctx->builder, LLVMIntEQ, srcs[2], LLVMConstInt(ctx->i32, 32, false), "");
+ result = ac_build_bfe(ctx, srcs[0], srcs[1], srcs[2], is_signed);
+ result = LLVMBuildSelect(ctx->builder, icond, srcs[0], result, "");
+ } else {
+ /* FIXME: LLVM 7 returns incorrect result when count is 0.
+ * https://bugs.freedesktop.org/show_bug.cgi?id=107276
+ */
+ LLVMValueRef zero = LLVMConstInt(ctx->i32, 0, false);
+ LLVMValueRef icond1 = LLVMBuildICmp(ctx->builder, LLVMIntEQ, srcs[2], LLVMConstInt(ctx->i32, 32, false), "");
+ LLVMValueRef icond2 = LLVMBuildICmp(ctx->builder, LLVMIntEQ, srcs[2], zero, "");
+
+ result = ac_build_bfe(ctx, srcs[0], srcs[1], srcs[2], is_signed);
+ result = LLVMBuildSelect(ctx->builder, icond1, srcs[0], result, "");
+ result = LLVMBuildSelect(ctx->builder, icond2, zero, result, "");
+ }
+
return result;
}