Consider regmasks when computing register-based DBG_VALUE live ranges
Now register parameters that aren't saved to the stack or CSRs are
considered dead after the first call. Previously the debugger would show
whatever was in the register.
Fixes PR26589
Reviewers: aprantl
Differential Revision: http://reviews.llvm.org/D17211
llvm-svn: 264429
diff --git a/llvm/test/DebugInfo/X86/live-debug-values.ll b/llvm/test/DebugInfo/X86/live-debug-values.ll
index 615d498..cdd83f7 100644
--- a/llvm/test/DebugInfo/X86/live-debug-values.ll
+++ b/llvm/test/DebugInfo/X86/live-debug-values.ll
@@ -31,7 +31,9 @@
; and BB#4.
; CHECK: .LBB0_5:
; CHECK-NEXT: #DEBUG_VALUE: main:n <- %EBX
-; CHECK-NEXT: #DEBUG_VALUE: main:argv <- %RSI
+; Other register values have been clobbered.
+; CHECK-NOT: #DEBUG_VALUE:
+; CHECK: movl %ecx, m(%rip)
; ModuleID = 'LiveDebugValues.c'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"