Module: Mesa
Branch: master
Commit: 51cf04cf0e4b348de7e920deff1dad3fb4e62407
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=51cf04cf0e4b348de7e920deff1dad3fb4e62407
Author: Marek Olšák <marek.ol...@amd.com>
Date: Tue May 17 23:10:24 2016 +0200
radeonsi: add a workaround for a bug in LLVM <= 3.8
This is not directly applicable to stable and needs to be backported.
Reviewed-by: Nicolai Hähnle <nicolai.haeh...@amd.com>
---
src/gallium/drivers/radeonsi/si_shader.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_shader.c
b/src/gallium/drivers/radeonsi/si_shader.c
index 6166403..3df7820 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -556,6 +556,13 @@ static LLVMValueRef get_bounded_indirect_index(struct
si_shader_context *ctx,
LLVMValueRef c_max = LLVMConstInt(ctx->i32, num - 1, 0);
LLVMValueRef cc;
+ /* LLVM 3.8: If indirect resource indexing is used:
+ * - SI & CIK hang
+ * - VI crashes
+ */
+ if (HAVE_LLVM <= 0x0308)
+ return LLVMGetUndef(ctx->i32);
+
if (util_is_power_of_two(num)) {
result = LLVMBuildAnd(builder, result, c_max, "");
} else {
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