Fix PR2667: add soft float support for sint_to_fp/uint_to_fp

where the argument is an apint, or smaller than the minimum
size for which there is a libcall (i32). 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58994 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 55 insertions, 0 deletions

diff --git a/test/CodeGen/Mips/2008-11-10-xint_to_fp.ll b/test/CodeGen/Mips/2008-11-10-xint_to_fp.ll
new file mode 100644
index 0000000..c9ee2cf
--- /dev/null
+++ b/test/CodeGen/Mips/2008-11-10-xint_to_fp.ll
@@ -0,0 +1,55 @@
+; RUN: llvm-as < %s | llc
+; PR2667
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
+target triple = "psp"
+	%struct._Bigint = type { %struct._Bigint*, i32, i32, i32, i32, [1 x i32] }
+	%struct.__FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*, i8*, i32)*, i32 (i8*, i8*, i32)*, i32 (i8*, i32, i32)*, i32 (i8*)*, %struct.__sbuf, i8*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i32, %struct._reent*, i32 }
+	%struct.__sbuf = type { i8*, i32 }
+	%struct._atexit = type { %struct._atexit*, i32, [32 x void ()*], %struct._on_exit_args }
+	%struct._glue = type { %struct._glue*, i32, %struct.__FILE* }
+	%struct._on_exit_args = type { [32 x i8*], [32 x i8*], i32, i32 }
+	%struct._reent = type { i32, %struct.__FILE*, %struct.__FILE*, %struct.__FILE*, i32, [25 x i8], i32, i8*, i32, void (%struct._reent*)*, %struct._Bigint*, i32, %struct._Bigint*, %struct._Bigint**, i32, i8*, { { [30 x i8*], [30 x i32] } }, %struct._atexit*, %struct._atexit, void (i32)**, %struct._glue, [3 x %struct.__FILE] }
+@_impure_ptr = external global %struct._reent*		; <%struct._reent**> [#uses=1]
+
+define double @_erand48_r(%struct._reent* %r, i16* %xseed) nounwind {
+entry:
+	tail call void @__dorand48( %struct._reent* %r, i16* %xseed ) nounwind
+	load i16* %xseed, align 2		; <i16>:0 [#uses=1]
+	uitofp i16 %0 to double		; <double>:1 [#uses=1]
+	tail call double @ldexp( double %1, i32 -48 ) nounwind		; <double>:2 [#uses=1]
+	getelementptr i16* %xseed, i32 1		; <i16*>:3 [#uses=1]
+	load i16* %3, align 2		; <i16>:4 [#uses=1]
+	uitofp i16 %4 to double		; <double>:5 [#uses=1]
+	tail call double @ldexp( double %5, i32 -32 ) nounwind		; <double>:6 [#uses=1]
+	add double %2, %6		; <double>:7 [#uses=1]
+	getelementptr i16* %xseed, i32 2		; <i16*>:8 [#uses=1]
+	load i16* %8, align 2		; <i16>:9 [#uses=1]
+	uitofp i16 %9 to double		; <double>:10 [#uses=1]
+	tail call double @ldexp( double %10, i32 -16 ) nounwind		; <double>:11 [#uses=1]
+	add double %7, %11		; <double>:12 [#uses=1]
+	ret double %12
+}
+
+declare void @__dorand48(%struct._reent*, i16*)
+
+declare double @ldexp(double, i32)
+
+define double @erand48(i16* %xseed) nounwind {
+entry:
+	load %struct._reent** @_impure_ptr, align 4		; <%struct._reent*>:0 [#uses=1]
+	tail call void @__dorand48( %struct._reent* %0, i16* %xseed ) nounwind
+	load i16* %xseed, align 2		; <i16>:1 [#uses=1]
+	uitofp i16 %1 to double		; <double>:2 [#uses=1]
+	tail call double @ldexp( double %2, i32 -48 ) nounwind		; <double>:3 [#uses=1]
+	getelementptr i16* %xseed, i32 1		; <i16*>:4 [#uses=1]
+	load i16* %4, align 2		; <i16>:5 [#uses=1]
+	uitofp i16 %5 to double		; <double>:6 [#uses=1]
+	tail call double @ldexp( double %6, i32 -32 ) nounwind		; <double>:7 [#uses=1]
+	add double %3, %7		; <double>:8 [#uses=1]
+	getelementptr i16* %xseed, i32 2		; <i16*>:9 [#uses=1]
+	load i16* %9, align 2		; <i16>:10 [#uses=1]
+	uitofp i16 %10 to double		; <double>:11 [#uses=1]
+	tail call double @ldexp( double %11, i32 -16 ) nounwind		; <double>:12 [#uses=1]
+	add double %8, %12		; <double>:13 [#uses=1]
+	ret double %13
+}