| ; RUN: llc -mtriple=thumb-eabi %s -o /dev/null |
| ; RUN: llc -mtriple=thumb-linux %s -o - | FileCheck %s |
| ; RUN: llc -mtriple=thumb-darwin %s -o - | FileCheck %s |
| |
| @str = internal constant [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1] |
| |
| define void @f(i32 %a, ...) { |
| entry: |
| ; Check that space is reserved above the pushed lr for variadic argument |
| ; registers to be stored in. |
| ; CHECK: sub sp, #[[IMM:[0-9]+]] |
| ; CHECK: push |
| %va = alloca i8*, align 4 ; <i8**> [#uses=4] |
| %va.upgrd.1 = bitcast i8** %va to i8* ; <i8*> [#uses=1] |
| call void @llvm.va_start( i8* %va.upgrd.1 ) |
| br label %bb |
| |
| bb: ; preds = %bb, %entry |
| %a_addr.0 = phi i32 [ %a, %entry ], [ %tmp5, %bb ] ; <i32> [#uses=2] |
| %tmp = load volatile i8*, i8** %va ; <i8*> [#uses=2] |
| %tmp2 = getelementptr i8, i8* %tmp, i32 4 ; <i8*> [#uses=1] |
| store volatile i8* %tmp2, i8** %va |
| %tmp5 = add i32 %a_addr.0, -1 ; <i32> [#uses=1] |
| %tmp.upgrd.2 = icmp eq i32 %a_addr.0, 1 ; <i1> [#uses=1] |
| br i1 %tmp.upgrd.2, label %bb7, label %bb |
| |
| bb7: ; preds = %bb |
| %tmp3 = bitcast i8* %tmp to i32* ; <i32*> [#uses=1] |
| %tmp.upgrd.3 = load i32, i32* %tmp3 ; <i32> [#uses=1] |
| %tmp10 = call i32 (i8*, ...) @printf( i8* getelementptr ([4 x i8], [4 x i8]* @str, i32 0, i64 0), i32 %tmp.upgrd.3 ) ; <i32> [#uses=0] |
| %va.upgrd.4 = bitcast i8** %va to i8* ; <i8*> [#uses=1] |
| call void @llvm.va_end( i8* %va.upgrd.4 ) |
| ret void |
| |
| ; The return sequence should pop the lr to r0-3, recover the stack space used to |
| ; store variadic argument registers, then return via r3. Possibly there is a pop |
| ; before this, but only if the function happened to use callee-saved registers. |
| ; CHECK: pop {[[POP_REG:r[0-3]]]} |
| ; CHECK: add sp, #[[IMM]] |
| ; CHECK: bx [[POP_REG]] |
| } |
| |
| declare void @llvm.va_start(i8*) |
| |
| declare i32 @printf(i8*, ...) |
| |
| declare void @llvm.va_end(i8*) |
