Bug 23418 – double argument is passed on stack, but assumed to be in XMM0 register

bool test_eqz(double x) { return x == 0; } int abc(int i) { test_eqz(123); return 2; } compiled with -m32 -O yields: _D5test38test_eqzFfZb: xorps XMM1,XMM1 ucomiss XMM1,XMM0 <--- XMM0 should be loaded from stack! jp LA je LE LA: xor EAX,EAX jmp short L13 LE: mov EAX,1 L13: ret 4 <--- correctly popped from stack add [EAX],AL _D5test33abcFiZi: sub ESP,018h movss XMM0,_D5test312__ModuleInfoZ@SYM32[03h] sub ESP,4 movss [ESP],XMM0 <--- XMMO passed on stack! call _D5test38test_eqzFfZb@PC32 add ESP,0Ch add ESP,0Ch mov EAX,2 ret

@WalterBright created dlang/dmd pull request #14568 "fix Issue 23418 - double argument is passed on stack, but assumed to …" fixing this issue: - fix Issue 23418 - double argument is passed on stack, but assumed to be in XMM0 register https://github.com/dlang/dmd/pull/14568

dlang/dmd pull request #14568 "fix Issue 23418 - double argument is passed on stack, but assumed to …" was merged into master: - 88d6d5b784ea267098c43ed123226b11af1798eb by Walter Bright: fix Issue 23418 - double argument is passed on stack, but assumed to be in XMM0 register https://github.com/dlang/dmd/pull/14568