Bug fix 13622: Add paired register support for inline asm with 64-bit data on ARM

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175088 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 55 insertions, 2 deletions

diff --git a/test/CodeGen/ARM/arm-modifier.ll b/test/CodeGen/ARM/arm-modifier.ll
index 5e12d8e..c747016 100644
--- a/test/CodeGen/ARM/arm-modifier.ll
+++ b/test/CodeGen/ARM/arm-modifier.ll
@@ -61,8 +61,7 @@ ret void
 define i64 @f4(i64* %val) nounwind {
 entry:
   ;CHECK: f4
-  ;CHECK: ldrexd [[REG1:(r[0-9]?[02468])]], {{r[0-9]?[13579]}}, [r0]
-  ;CHECK: mov r0, [[REG1]]
+  ;CHECK: ldrexd [[REG1:(r[0-9]?[02468])]], {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
   %0 = tail call i64 asm sideeffect "ldrexd $0, ${0:H}, [$1]", "=&r,r,*Qo"(i64* %val, i64* %val) nounwind
   ret i64 %0
 }
diff --git a/test/CodeGen/ARM/inlineasm-64bit.ll b/test/CodeGen/ARM/inlineasm-64bit.ll
new file mode 100644
index 0000000..df5d440
--- /dev/null
+++ b/test/CodeGen/ARM/inlineasm-64bit.ll
@@ -0,0 +1,54 @@
+; RUN: llc < %s -O3 -march=arm | FileCheck %s
+
+; check if regs are passing correctly
+define void @i64_write(i64* %p, i64 %val) nounwind {
+; CHECK: i64_write:
+; CHECK: ldrexd [[REG1:(r[0-9]?[02468])]], {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; CHECK: strexd [[REG1]], {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}
+  %1 = tail call i64 asm sideeffect "1: ldrexd $0, ${0:H}, [$2]\0A strexd $0, $3, ${3:H}, [$2]\0A teq $0, #0\0A bne 1b", "=&r,=*Qo,r,r,~{cc}"(i64* %p, i64* %p, i64 %val) nounwind
+  ret void
+}
+
+; check if register allocation can reuse the registers
+define void @multi_writes(i64* %p, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind {
+entry:
+; CHECK: multi_writes:
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; check: strexd {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+
+  tail call void asm sideeffect " strexd $1, ${1:H}, [$0]\0A strexd $2, ${2:H}, [$0]\0A strexd $3, ${3:H}, [$0]\0A strexd $4, ${4:H}, [$0]\0A strexd $5, ${5:H}, [$0]\0A strexd $6, ${6:H}, [$0]\0A", "r,r,r,r,r,r,r"(i64* %p, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind
+  %incdec.ptr = getelementptr inbounds i64* %p, i32 1
+  tail call void asm sideeffect " strexd $1, ${1:H}, [$0]\0A strexd $2, ${2:H}, [$0]\0A strexd $3, ${3:H}, [$0]\0A strexd $4, ${4:H}, [$0]\0A strexd $5, ${5:H}, [$0]\0A strexd $6, ${6:H}, [$0]\0A", "r,r,r,r,r,r,r"(i64* %incdec.ptr, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind
+  tail call void asm sideeffect " strexd $1, ${1:H}, [$0]\0A strexd $2, ${2:H}, [$0]\0A strexd $3, ${3:H}, [$0]\0A strexd $4, ${4:H}, [$0]\0A strexd $5, ${5:H}, [$0]\0A strexd $6, ${6:H}, [$0]\0A", "r,r,r,r,r,r,r"(i64* %incdec.ptr, i64 %val1, i64 %val2, i64 %val3, i64 %val4, i64 %val5, i64 %val6) nounwind
+  ret void
+}
+
+
+; check if callee-saved registers used by inline asm are saved/restored
+define void @foo(i64* %p, i64 %i) nounwind {
+; CHECK:foo:
+; CHECK: push {{{r[4-9]|r10|r11}}
+; CHECK: ldrexd [[REG1:(r[0-9]?[02468])]], {{r[0-9]?[13579]}}, [r{{[0-9]+}}]
+; CHECK: strexd [[REG1]], {{r[0-9]?[02468]}}, {{r[0-9]?[13579]}}
+; CHECK: pop {{{r[4-9]|r10|r11}}
+  %1 = tail call { i64, i64 } asm sideeffect "@ atomic64_set\0A1: ldrexd $0, ${0:H}, [$3]\0Aldrexd $1, ${1:H}, [$3]\0A strexd $0, $4, ${4:H}, [$3]\0A teq $0, #0\0A bne 1b", "=&r,=&r,=*Qo,r,r,~{cc}"(i64* %p, i64* %p, i64 %i) nounwind
+  ret void
+}