[mips] Make sure loads from lazy-binding entries do not get CSE'd or hoisted out
of loops.
Previously, two consecutive calls to function "func" would result in the
following sequence of instructions:
1. load $16, %got(func)($gp) // load address of lazy-binding stub.
2. move $25, $16
3. jalr $25 // jump to lazy-binding stub.
4. nop
5. move $25, $16
6. jalr $25 // jump to lazy-binding stub again.
With this patch, the second call directly jumps to func's address, bypassing
the lazy-binding resolution routine:
1. load $25, %got(func)($gp) // load address of lazy-binding stub.
2. jalr $25 // jump to lazy-binding stub.
3. nop
4. load $25, %got(func)($gp) // load resolved address of func.
5. jalr $25 // directly jump to func.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191591 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/Mips/i64arg.ll b/test/CodeGen/Mips/i64arg.ll
index 0b16424..b038ad5 100644
--- a/test/CodeGen/Mips/i64arg.ll
+++ b/test/CodeGen/Mips/i64arg.ll
@@ -9,11 +9,11 @@
; CHECK: lw $25, %call16(ff1)
; CHECK: jalr
tail call void @ff1(i32 %i, i64 1085102592623924856) nounwind
-; CHECK: lw $25, %call16(ff2)
-; CHECK: lw $[[R2:[0-9]+]], 80($sp)
-; CHECK: lw $[[R3:[0-9]+]], 84($sp)
-; CHECK: move $4, $[[R2]]
-; CHECK: move $5, $[[R3]]
+; CHECK-DAG: lw $25, %call16(ff2)
+; CHECK-DAG: lw $[[R2:[0-9]+]], 80($sp)
+; CHECK-DAG: lw $[[R3:[0-9]+]], 84($sp)
+; CHECK-DAG: move $4, $[[R2]]
+; CHECK-DAG: move $5, $[[R3]]
; CHECK: jalr $25
tail call void @ff2(i64 %ll, double 3.000000e+00) nounwind
%sub = add nsw i32 %i, -1