ARM: match GCC's behaviour for builtins

GCC changes the CC between the user-code and the builtins based on the
value of `-target` rather than `-mfloat-abi`.  When a HF target is used,
the VFP variant of the AAPCS CC is used.  Otherwise, the AAPCS variant
is used.  In all cases, the AEABI functions use the AAPCS CC.  Adjust
the calling convention based on the target.

Resolves PR30543!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291909 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 43 insertions, 2 deletions

diff --git a/test/CodeGen/Thumb2/float-intrinsics-double.ll b/test/CodeGen/Thumb2/float-intrinsics-double.ll
index 9e949908382..657d1b172da 100644
--- a/test/CodeGen/Thumb2/float-intrinsics-double.ll
+++ b/test/CodeGen/Thumb2/float-intrinsics-double.ll
@@ -18,7 +18,7 @@ declare double     @llvm.powi.f64(double %Val, i32 %power)
 define double @powi_d(double %a, i32 %b) {
 ; CHECK-LABEL: powi_d:
 ; SOFT: {{(bl|b)}} __powidf2
-; HARD: bl __powidf2
+; HARD: b __powidf2
   %1 = call double @llvm.powi.f64(double %a, i32 %b)
   ret double %1
 }
diff --git a/test/CodeGen/Thumb2/float-intrinsics-float.ll b/test/CodeGen/Thumb2/float-intrinsics-float.ll
index fda840d90f3..847aeacd2f9 100644
--- a/test/CodeGen/Thumb2/float-intrinsics-float.ll
+++ b/test/CodeGen/Thumb2/float-intrinsics-float.ll
@@ -18,7 +18,7 @@ declare float     @llvm.powi.f32(float %Val, i32 %power)
 define float @powi_f(float %a, i32 %b) {
 ; CHECK-LABEL: powi_f:
 ; SOFT: bl __powisf2
-; HARD: bl __powisf2
+; HARD: b __powisf2
   %1 = call float @llvm.powi.f32(float %a, i32 %b)
   ret float %1
 }
diff --git a/test/CodeGen/Thumb2/intrinsics-cc.ll b/test/CodeGen/Thumb2/intrinsics-cc.ll
new file mode 100644
index 00000000000..ab5081e3ab9
--- /dev/null
+++ b/test/CodeGen/Thumb2/intrinsics-cc.ll
@@ -0,0 +1,41 @@
+; RUN: llc -mtriple thumbv7-unknown-none-eabi -float-abi soft -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MATCH
+; RUN: llc -mtriple thumbv7-unknown-none-eabi -float-abi hard -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MISMATCH -check-prefix CHECK-TO-SOFT
+; RUN: llc -mtriple thumbv7-unknown-none-eabihf -float-abi soft -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MISMATCH -check-prefix CHECK-TO-HARD
+; RUN: llc -mtriple thumbv7-unknown-none-eabihf -float-abi hard -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MATCH
+
+; RUN: llc -mtriple thumbv7-unknown-none-gnueabi -float-abi soft -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MATCH
+; RUN: llc -mtriple thumbv7-unknown-none-gnueabi -float-abi hard -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MISMATCH -check-prefix CHECK-TO-SOFT
+; RUN: llc -mtriple thumbv7-unknown-none-gnueabihf -float-abi soft -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MISMATCH -check-prefix CHECK-TO-HARD
+; RUN: llc -mtriple thumbv7-unknown-none-gnueabihf -float-abi hard -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MATCH
+
+; RUN: llc -mtriple thumbv7-unknown-none-musleabi -float-abi soft -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MATCH
+; RUN: llc -mtriple thumbv7-unknown-none-musleabi -float-abi hard -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MISMATCH -check-prefix CHECK-TO-SOFT
+; RUN: llc -mtriple thumbv7-unknown-none-musleabihf -float-abi soft -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MISMATCH -check-prefix CHECK-TO-HARD
+; RUN: llc -mtriple thumbv7-unknown-none-musleabihf -float-abi hard -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-MATCH
+
+declare float @llvm.powi.f32(float, i32)
+
+define float @f(float %f, i32 %i) {
+entry:
+  %0 = call float @llvm.powi.f32(float %f, i32 %i)
+  ret float %0
+}
+
+; CHECK-MATCH: b __powisf2
+; CHECK-MISMATCH: bl __powisf2
+; CHECK-TO-SOFT: vmov s0, r0
+; CHECK-TO-HARD: vmov r0, s0
+
+declare double @llvm.powi.f64(double, i32)
+
+define double @g(double %d, i32 %i) {
+entry:
+  %0 = call double @llvm.powi.f64(double %d, i32 %i)
+  ret double %0
+}
+
+; CHECK-MATCH: b __powidf2
+; CHECK-MISMATCH: bl __powidf2
+; CHECK-TO-SOFT: vmov d0, r0, r1
+; CHECK-TO-HARD: vmov r0, r1, d0
+