Add the ARM32 FP register table entries, simple arith, and args.

tests_lit/llvm2ice_tests/fp.call_ret.ll

+; This tries to be a comprehensive test of f32 and f64 call/return ops.
+; The CHECK lines are only checking for basic instruction patterns
+; that should be present regardless of the optimization level, so
+; there are no special OPTM1 match lines.
+
+; RUN: %if --need=target_X8632 --command %p2i --filetype=obj --disassemble \
+; RUN:   --target x8632 -i %s --args -O2 \
+; RUN:   | %if --need=target_X8632 --command FileCheck %s
+; RUN: %if --need=target_X8632 --command %p2i --filetype=obj --disassemble \
+; RUN:   --target x8632 -i %s --args -Om1 \
+; RUN:   | %if --need=target_X8632 --command FileCheck %s
+
+; Can't test on ARM yet. Need to use several vpush {contiguous FP regs},
+; instead of push {any GPR list}.
+
+define internal i32 @doubleArgs(double %a, i32 %b, double %c) {
+entry:
+  ret i32 %b
+}
+; CHECK-LABEL: doubleArgs
+; CHECK:      mov eax,DWORD PTR [esp+0xc]
+; CHECK-NEXT: ret
+; ARM32-LABEL: doubleArgs
+
+define internal i32 @floatArgs(float %a, i32 %b, float %c) {
+entry:
+  ret i32 %b
+}
+; CHECK-LABEL: floatArgs
+; CHECK:      mov eax,DWORD PTR [esp+0x8]
+; CHECK-NEXT: ret
+
+define internal i32 @passFpArgs(float %a, double %b, float %c, double %d, float %e, double %f) {
+entry:
+  %call = call i32 @ignoreFpArgsNoInline(float %a, i32 123, double %b)
+  %call1 = call i32 @ignoreFpArgsNoInline(float %c, i32 123, double %d)
+  %call2 = call i32 @ignoreFpArgsNoInline(float %e, i32 123, double %f)
+  %add = add i32 %call1, %call
+  %add3 = add i32 %add, %call2
+  ret i32 %add3
+}
+; CHECK-LABEL: passFpArgs
+; CHECK: mov DWORD PTR [esp+0x4],0x7b
+; CHECK: call {{.*}} R_{{.*}} ignoreFpArgsNoInline
+; CHECK: mov DWORD PTR [esp+0x4],0x7b
+; CHECK: call {{.*}} R_{{.*}} ignoreFpArgsNoInline
+; CHECK: mov DWORD PTR [esp+0x4],0x7b
+; CHECK: call {{.*}} R_{{.*}} ignoreFpArgsNoInline
+
+declare i32 @ignoreFpArgsNoInline(float %x, i32 %y, double %z)
+
+define internal i32 @passFpConstArg(float %a, double %b) {
+entry:
+  %call = call i32 @ignoreFpArgsNoInline(float %a, i32 123, double 2.340000e+00)
+  ret i32 %call
+}
+; CHECK-LABEL: passFpConstArg
+; CHECK: mov DWORD PTR [esp+0x4],0x7b
+; CHECK: call {{.*}} R_{{.*}} ignoreFpArgsNoInline
+
+define internal i32 @passFp32ConstArg(float %a) {
+entry:
+  %call = call i32 @ignoreFp32ArgsNoInline(float %a, i32 123, float 2.0)
+  ret i32 %call
+}
+; CHECK-LABEL: passFp32ConstArg
+; CHECK: mov DWORD PTR [esp+0x4],0x7b
+; CHECK: movss DWORD PTR [esp+0x8]
+; CHECK: call {{.*}} R_{{.*}} ignoreFp32ArgsNoInline
+
+declare i32 @ignoreFp32ArgsNoInline(float %x, i32 %y, float %z)
+
+define internal float @returnFloatArg(float %a) {
+entry:
+  ret float %a
+}
+; CHECK-LABEL: returnFloatArg
+; CHECK: fld DWORD PTR [esp
+
+define internal double @returnDoubleArg(double %a) {
+entry:
+  ret double %a
+}
+; CHECK-LABEL: returnDoubleArg
+; CHECK: fld QWORD PTR [esp
+
+define internal float @returnFloatConst() {
+entry:
+  ret float 0x3FF3AE1480000000
+}
+; CHECK-LABEL: returnFloatConst
+; CHECK: fld
+
+define internal double @returnDoubleConst() {
+entry:
+  ret double 1.230000e+00
+}
+; CHECK-LABEL: returnDoubleConst
+; CHECK: fld